Easter and Anti-Semitism

I'm not Quartodecimian. I see no reason to be. Nevertheless, I find the following interesting:

'The feast of the resurrection was thenceforth required to be celebrated everywhere on a Sunday, and never on the day of the Jewish passover, but always after the fourteenth of Nisan, on the Sunday after the first vernal full moon. The leading motive for this regulation was opposition to Judaism, which had dishonored the passover by the crucifixion of the Lord.” We would,” says the circular letter of Constantine in reference to the council of Nice, “we would have nothing in common with that most hostile people, the Jews; for we have received from the Redeemer another way of honoring God, and harmoniously adopting this method, we would withdraw ourselves from the evil fellowship of the Jews. For what they pompously assert, is really utterly absurd: that we cannot keep this feast at all without their instruction .... It is our duty to have nothing in common with the murderers of our Lord.” This bitter tone against Judaism runs through the whole letter.'
(Philip Schaff, History of the Christian Church Vol. III, pg 405)