That may have been the case up contemporarily but considering the irredentistist trends amongst the conservative bloc there are doubts it'll hold up in the current politic climate. The West and the world in general are at multiple critical junctures in political, cultural, and economic paradigm shifts. Right-wing populism, even among the less or non-religious, embrace conspiracy theories that placate Jews and Catholics as 'anti-Christ' figures. As economic and social conditions worsen more people embrace non-mainstream narratives and religious extremism.This was the case for traditional Christians, like old catholics and old protestants. But since 1945 Europe is under US military occupation and priests and pastors who still were antisemitics were banned and new ones pro Israel and pro US were promoted.
In the 60s, in the occupied Rome, took place the II Vatican Concil that changed all traditions and beliefs of the Catholic Church. So Jews are now seen like victims and must be defended.
And the Lutheran Church, whose beliefs legitimized the Holocaust in Germany, also went through purges and today defends the Jews.
Anything past that though is mostly speculation but those religious and socio-culture underpinnings can factor in the event of social or political breakdown. However, it is an interesting and makes matters more multi-dimensional given that anti-Semitism has risen moreso among African-Americans, which is mostly linked to the Hebrew Israelite movement and Sufi movements among African-Americans who bought into to the idea from a group of West African Evangelical pastors during British colonization in the late 1800s. Even some white conservative pundits have started echoing this sentiment about African-Americans which is sure to come in conflict with Jews
It's important to remember this is largely is developing but old institutions and alliances are coming into fray and regression is possible.