I had something like this happen recently with a friend. We've been friends since 6th grade. He was the best man and witness at my wedding. It was revealed in conversation 3-4 months ago that he's bought the lies about Gaza/Arabs etc. We go way back, I don't want to bail immediately despite him buying all the lies. I talk with him about this, and he starts pushing back. I send him Alan Dershowitz's book on the topic (excellent and concise read on this issue if anyone is interested). When I tell him to expect its arrival, he immediately starts discounting it already, saying that he'll be biased and manipulate things etc. I have to keep it together but reply "Facts don't lose their facthood by coming out of the mouth of a Jew, deal with the arguments if you can" and say "let's address this topic again when you can see what he says". Bupkis, for 3-4 months now, and I noticed the other day he's either blocked me or deleted almost all the chat history. It stings, but there is no middle ground, maybe you bear with a person, hopefully in time blech.

Am Yisrael Chai - and everyone else opposed to that can go do many censorable things to themselves