I disagree with most everything you said in your post above mine.
Since Judeo-Christian ethics (with its idea of compassion for the weak/poor) is fundamental to Western culture
I disagree with this. It might be in The Book, but it clearly isn't followed all that well, then or now. I wish it were, but it's not. Humans are selfish (just like ALL animals) and religion might try to correct that, but it's almost always a losing fight.
I'll grant that he may have
wanted that, but he knew he couldn't achieve it. Maybe plant the seeds. Maybe alter it a bit in his image, but he was smart enough to know he couldn't wash it down the drain. That was his power base. It would be like a current important GOP politician saying "ya know what, this religion thing is stupid and we should use logic, reason and science to affect change in government." It ain't going to happen now, and it wasn't going to happen then.
Christians, historically as a group, have had no problem hating "others". European Christians had their Jews (and other "browns"), American Christians had their black slaves (and Catholics and Jews). Of course there are always exceptions. Even some Nazi's helped Jews to escape, but Hitler and the Nazi's didn't have to (and didn't) "breach with Christianity" to convince the Germans (and, to be fair, French, Norwegians, Lithuanians, Ukrainians, etc) to round up the Jews (and others).