Because they have a very deep and irrational hatred of Jews that stems directly from the way the koran talks about them.
Here's a comment to the contrary from another poster which I found illuminating: https://news.ycombinator.com/item?id=47605903
alt Hacker News
Here's a comment to the contrary from another poster which I found illuminating: https://news.ycombinator.com/item?id=47605903