Not sure I can agree with you, as I think they see them as equal & united. Both the Jews & the Christians have been subjected to this hatred in the past. However, the Jews have experienced it in recent history, so perhaps it hits a much more sensitive nerve. I have seen this slow march to reject & condemn Christianity rearing its ugly head for decades now. At least since the late 80's early 90's. Sometime around the first intifada that started in 1987 thru 1993. Because they mistakenly believed it was just rock throwing children against a brutal Israeli military, because they were not being told the entire truth. This is one of the reasons we also see so much support for Islam, even as they threaten us with our very lives. Systematic brainwashing propagated by the press from around the globe, who did what their employers demanded or found their career ruined.
Ironically enough the alt-right, as unsavory and antithetical to traditional conservatism as aspects of it frequently are, is a direct result of the left being “the man” for most or all of the conscience memory of Generation Zers, who are rebelling in their turn by swinging right in their own way.