[RobbyS]

It seems to have been the custom not to keep the sabbath in the 2nd Century, since by that time the majority of Christians were no longer Jews. The destruction of the Temple and the exclusion of Christians from the synagogues left Christians on their own. There is the implication here that Christians were the only ones at fault.

[DouglasKC]

It seems to have been the custom not to keep the sabbath in the 2nd Century, since by that time the majority of Christians were no longer Jews. The destruction of the Temple and the exclusion of Christians from the synagogues left Christians on their own. There is the implication here that Christians were the only ones at fault.

Possibly, but the biggest reason seems to have been anti-semitism on the part of the early church. The letter from Constatine certainly shows the attitude of hatred that many of that time felt toward the Jews.