Dear Binyamin —

It's admirable that you're engaging with Catholic history and theology, and it's important to address the difficult aspects with honesty and a commitment to truth.

I understand your concerns about the historical treatment of Jews and the need for reconciliation.
Here's an attempt to address your questions with nuance and directness, drawing upon Catholic sources:

• How does the Church today reconcile the evil perpetuated by the Inquisitors?
  

The Church acknowledges the grave errors and injustices committed during the Inquisition. Pope St. John Paul II, in his address to the Symposium on the Inquisition in 1998, called for Christians to revisit this "troubled period of the Church’s history with an open mind".  (1) He emphasized the need for accurate historical reconstruction before making ethical judgments and recognized the "intolerance and even the use of violence in the service of truth".  (1)

"Another painful chapter of history to which the sons and daughters of the Church must return with a spirit of repentance is that of the acquiescence given, especially in certain centuries, to intolerance and even the use of violence in the service of the truth”.

To the participants in the Symposium on Inquisition
(October 31, 1998) 4 / Pope St. John Paul II (1)

The Church's approach involves:

• Repentance: Recognizing and regretting the sins of the past.  (2)
• Historical Accuracy: Seeking a precise understanding of events, customs, and mentalities within their historical context.  (1)
• Ethical Judgement: Objectively evaluating the past based on historical facts and Gospel values.  (1)
• New Evangelization: Contributing to a renewed understanding and relationship between Christians and Jews.  (1)

The modern view contrasts sharply with the historical context of the Inquisition, which was characterized by religious intolerance and the close intertwining of secular and religious authority. (3, 4) The Church today emphasizes religious freedom and condemns violence in the name of faith.  (5, 6)

• What of those who were beatified and canonized who had truly evil and racist ideas?
  

The process of beatification and canonization is rigorous, involving examination of a person's life, heroic virtue, and any miracles attributed to their intercession. (7, 8, 9, 10) The Church recognizes the power of the Spirit of holiness and proposes saints as models and intercessors. (9)

"By canonizing some of the faithful, i.e., by solemnly pro claiming that they practiced heroic virtue and lived in fidelity to God's grace, the Church recognizes the power of the Spirit of holiness within her and sustains the hope of believers by proposing the saints to them as models and intercessors".

CCC 828 (9)

However, the Church acknowledges that historical figures lived within the context of their times, and some may have held views that are now considered unacceptable.  (1) When considering candidates for sainthood, the Church now takes into account the historical and cultural context in which they lived, while also evaluating their adherence to the Gospel values of love, justice, and respect for all persons. (1, 11, 12, 13, 14). If there is evidence of holding "truly evil and racist ideas," it would be a significant impediment to canonization.

• Why did people get murdered for the clearly fake Blood Libels of Simon of Trent and Hugh of Lincoln?
  

The "blood libel," the false accusation that Jews used the blood of Christians for ritual purposes, has been condemned by numerous popes and Church authorities. (15, 16) This accusation is entirely baseless and contradicts Jewish law. (15, 16, 17)

"And most falsely do these Christians claim that the Jews have secretly and furtively carried away these children and killed them, and that the Jews offer sacrifices from the heart and the blood of these children, since their law in this matter precisely and expressly forbids Jews to sacrifice, eat, or drink the blood, or to eat the flesh of animals having claws."

Protection Of The Jews / Pope Gregory X, October 7, 1272 (15)

The deaths of individuals like Simon of Trent and Hugh of Lincoln, which were attributed to Jews based on these false accusations, are a tragic example of religiously motivated violence and injustice fueled by popular hatred and prejudice. (16, 17) The Church today unequivocally rejects such accusations and recognizes them as a source of deep shame and sorrow. (2)

• How does the Church today view Dr. August Rohling and Justin Parantis and their forgeries of Jewish beliefs and practices to their Catholic audiences?
  

The Church would view individuals like Dr. August Rohling and Justin Parantis, who fabricated Jewish beliefs and practices, as acting in direct opposition to the Gospel values of truth, love, and respect for others. (5, 6) Their actions would be considered a grave offense against both Jews and Christians, as they promoted hatred and division based on falsehoods. (5, 6, 2) The Church condemns such misrepresentations and emphasizes the importance of accurate and respectful interreligious dialogue. (2)

Nostra Aetate

"Nostra Aetate," the Declaration on the Relation of the Church to Non-Christian Religions from the Second Vatican Council, is a landmark document that has transformed Catholic-Jewish relations. (2) It is considered theologically binding in that it expresses the Church's authoritative teaching on the relationship with other religions. (2) It is rooted in the Gospel's spiritual love and deplores hatred, persecutions, and displays of anti-Semitism directed against the Jews at any time and from any source. (2)

I hope this response provides some clarity and reassurance. The Church's journey toward reconciliation is ongoing, and it requires continuous dialogue, education, and a commitment to justice and truth.

References:

1. To the participants in the Symposium on Inquisition (October 31, 1998) 4 / Pope John Paul II
2. We Remember. A Reflection on the Shoah (16 March 1998) / Commission for Relations with Judaism
3. Catholic Encyclopedia Spain / The Encyclopedia Press
4. To promote and safeguard the faith / Congregation for the Doctrine of the Faith
5. Jubilee Pilgrimage to the Holy Land: Visit to the Yad Vashem Museum, Jerusalem (March 23, 2000) - Speech 3 / Pope John Paul II
6. To the participants in a symposium on the roots of anti-Judaism (October 31, 1997) 4 / Pope John Paul II
7. A Catechism of Christian Doctrine (The Baltimore Catechism No. 3) Question 80 / Third Plenary Council of Baltimore
8. A Catechism of Christian Doctrine (The Baltimore Catechism No. 3) Question 79 / Third Plenary Council of Baltimore
9. CCC 828
10. Gaudete et exsultate 5 / Pope Francis
11. Regulation of the postulators Preface / Congregation for the Causes of the Saints
12. “Sanctorum Mater”: Instruction for conducting diocesan or eparchial Inquiries in the causes of Saints Article 4 / Congregation for the Causes of Saints
13. To Superiors, Officials and Collaborators of the Congregation for the Causes of Saints, on the occasion of the 40th anniversary of the institution of the Dicastery (December 19, 2009) / Pope Benedict XVI
14. To participants in the Symposium promoted by the Dicastery for the Causes of Saints / Pope Francis
15. Protection Of The Jews / Pope Gregory X, October 7, 1272
16. Catholic Encyclopedia St. William of Norwich / The Encyclopedia Press
17. Catholic Encyclopedia Judaism / The Encyclopedia Press