If you look hard enough on Facebook you'll find both anti-Israeli and anti-Palestinian (and pro-both). Anecdotes from a single person's filter bubble aren't really evidence.
> In a simple test, the organization tracked down two existing Facebook pages – one pro-Israeli, and one pro-Palestinian – and uploaded content to each that was rife with incitement to violence and hate.
Sample size of two is just another anecdote.
Anyone who's reported large numbers of Facebook pages - like https://twitter.com/monteiro, who's been on a anti-gun sale campaign - knows getting a page taken down often depends on the random reviewer assigned to the case. I've personally reported the same page several times before someone at FB says "yep, deleted".
One were full of hate messages towards Israelis.
The other one were full of hate messages towards Palestinian Arabs.
One were closed almost immediately.
One were not.
Care were taken to make sure they were exactly similar.
Sources:
https://www.google.no/search?q=israeli+palestinian+hate+grou...
(Please note that Facebook admitted this to be the case.)