It is abundantly clear some early church fathers/leaders had the improper attitude toward the relationship between Gentile Christians and Jewish/Israelite Christians.
A concerted effort on the part of Gentile Christians of Christianity was made to diminish the unity of the two groups with regards to practices and customs.
Consider the below quote from Homily 1 of St. John Chrysostom, Against the Jews:
“(4)…Another very serious illness calls for any cure my words can bring, an illness which has become implanted in the body of the Church. We must first root this ailment out and then take thought for matters outside; we must first cure our own and then be concerned for others who are strangers.
(5) What is this disease? The festivals of the pitiful and miserable Jews are soon to march upon us one after the other and in quick succession: the feast of Trumpets, the feast of Tabernacles, the fasts. There are many in our ranks who say they think as we do. Yet some of these are going to watch the festivals and others will join the Jews in keeping their feasts and observing their fasts. I wish to drive this perverse custom from the Church right now. My homilies against the Anomians can be put off to another time, and the postponement would cause no harm. But now that the Jewish festivals are close by and at the very door, if I should fail to cure those who are sick with the Judaizing disease. I am afraid that, because of their ill-suited association and deep ignorance, some Christians may partake in the Jews’ transgressions; once they have done so, I fear my homilies on these transgressions will be in vain. For if they hear no word from me today, they will then join the Jews in their fasts; once they have committed this sin it will be useless for me to apply the remedy.
(6) And so it is that I hasten to anticipate this danger and prevent it. This is what physicians do. They first check the diseases which are most urgent and acute. But the danger from this sickness is very closely related to the danger from the other; since the Anomians impiety is akin to that of the Jews, my present conflict is akin to my former one. And there is a kingship because the Jews and the Anomians make the same accusation. And what charges do the Jews make? That He called God His own Father and so made Himself equal to God. The Anomians also make this charge-I should not say they make this a charge; they even blot out the phrase “equal to God” and what it connotes, by their resolve to reject it even if they do not physically erase it.
II
But do not be surprised that I called the Jews pitiable. They really are pitiable and miserable. When so many blessings from heaven came into their hands, they thrust them aside and were at great pains to reject them. The morning Sun of Justice arose for them, but they thrust aside its rays and still sit in darkness. We, who were nurtured by darkness, drew the light to ourselves and were freed from the gloom of their error. They were the branches of that holy root, but those branches were broken. We had no share in the root, but we did reap the fruit of godliness. From their childhood they read the prophets, but they crucified him whom the prophets had foretold. We did not hear the divine prophecies but we did worship him of whom they prophesied. And so they are pitiful because they rejected the blessings which were sent to them, while others seized hold of these blessing and drew them to themselves. Although those Jews had been called to the adoption of sons, they fell to kinship with dogs; we who were dogs received the strength, through God’s grace, to put aside the irrational nature which was ours and to rise to the honor of sons.”
References:
John Chrysostom, Against the Jews Homilies 1 – 8
