They are ethnic Jews. And hating Christians is as cultural for ethnic Jews as sneakers and basketball are for Blacks.

Here's a Mizrai Jewish girl explaining it:

https://twitter.com/i/broadcasts/1OdKrWdXRdkGX

And here's the infamous Toffee and Gorilla segment talking about it:

https://youtu.be/HytrKvXGljc

(I know tons of people get confused about that show. It's a faux children's show for adults. It's like a Cartoon Network Adult Swim show. Israel does not have bikini-clad women teaching history to kids.) Notice how Toffee frames why Jews hate Jesus as a cultural thing. Jews hate Jesus in the same way Americans hate communists and fascists: They are trying to make Americans unAmerican. So, (ethnic) Jews hate Jesus for trying to make (ethnic) Jews not culturally Jewish.