Why did the crusaders (and Christians of the time as a whole) dislike jews? Like hey, I’m a good little catholic boy as well but why hate the Jews? I get that killing JC is a pretty bad thing but I never got how you could hate jews and then use the Old Testament and speak highly of the Jews that feature in it.
The thing is that Jesus fulfilled the Old covenant of God to Israel and its Hebrews, that we all be saved in the afterlife forever through him, and such that from that point onwards, "Israel" consisted of the Church and its people, Gentile, or (formerly) Jew.
It stands to reason then, then those Hebrews, who remained Jew, instead of joining with God in the New Covenant of the the Church, salvation through Christ, did so either through ignorance, or direct rejection of the will of God, insofar as a establishing a New Covenant and dispensing with the Old.
Since it had been a millennium since the coming of Christ, it could no longer be through ignorance, so it had to be antagonism to God through him as Christ.
And not only were the rejecting the veracity of God and his promises, but also by affirming the Old Covenant, they were affirming that, they the Jews, were the Chosen People, and Catholics of the spiritual Israel, the Church, were not chosen by God.
To say nothing of the charges of deicide, and descent from the Pharisees which Christ called the synongauge of Satan .