It's there, like it is everywhere. I just ignore it and move on. I figure anyone ranting about 'evil jewwwwwwws' is not really someone I want to talk to.
My Savior was a Jew. It seems to me that God, in his wisdom, has had a soft spot in his heart for the Jewish nation since pretty much the beginning of time on this planet. I really don't feel it's my place to question that.
I have not seen anti-Semitism Gab but might be able to find it if I really wanted to see it.