Pope Gregory I and Judaism

Pope Gregory I (c.540–604), also known as Gregory the Great, was influential in the formation of Catholic doctrine in relation to the Jews. He was responsible for a notable Papal Bull which spoke of a requirement for Christians to protect and defend the Jewish people, which became official doctrine. He publicly disapproved of the compulsory baptism of Jews, and insisted on their right to liberty of action, both in civil affairs and in their worship. In his sermons, he complained of the obduracy of the Jews and their stony hearts.

The position of Jews in society
In various epistles, Gregory insisted on the right of Jews to "liberty of action, so far as the law permitted, both in civil affairs and in the worship of the synagogue" (Epistles 1.34; 2.6; 8.25; 9.38; 9.195; 13.15). But Gregory wrote of limiting the Jews from exceeding the rights granted to them under imperial law – particularly in relation to the ownership of Christian slaves (Epistles 2.6; 3.37; 4.9; 4.21; 6.29; 7.21; 8.21; 9.104; 9.213; 9.215).

Condemnation of forced conversions
In Epistle 1.14, Pope Gregory expressly disapproved of the compulsory baptism of Jews

June 591 : "Censure of Virgil, bishop of Arles, and Theodore, bishop of Marseille, for having baptized Jews by force. They are to desist.

"'For it is necessary to gather those who are at odds with the Christian religion the unity of faith by meekness, by kindness, by admonishing, by persuading, lest these...should be repelled by threats and terrors. They ought, therefore, to come together to hear from you the Word of God in a kindly frame of mind, rather than stricken with dread, result of a harshness that goes beyond due limits.'"

Admonition of Paschasius
November 602 : "Admonition to Paschasius, bishop of Naples, to ensure that the Jews are not disturbed in the celebration of their religious festivals."

"'TO PASCHASIUS, BISHOP OF NAPLES: Those who, with sincere intent, desire to lead people outside the Christian religion to the correct faith, ought to make the effort by means of what is pleasant, not with what is harsh, lest opposition drive afar the mind of men whom reasoning...could have attracted. Those who act otherwise...demonstrate that they are concerned with their own enterprises, rather than with those of God!

Now, the Jews dwelling in Naples have registered a complaint with Us, asserting that certain people are attempting, in an unreasonable fashion, to restrain them from some of the solemnities connected with their own feast days, as it has been lawful for them to observe or celebrate these up to now, and for their forefathers from long ages past...For of what use is this, when...it avails nothing toward their faith and conversion?...One must act, therefore, in such a way that...they might desire to follow us rather than to fly from us...Rather let them enjoy their lawful liberty to observe and to celebrate their festivities, as they have enjoyed this up until now.'"