The same thing happened to someone I know in real life. He was a total Trumper, and his Facebook page was really active with a whole bunch of MAGAs commenting on his posts.
In 2016 he unfriended me because of something I said during the election. That was was my fault, so, ok. I wasn't so active on FB anymore anyways, too much phony bs from even people I personally knew.
Then in 2017, he blocked me because I had Liked a comment (I couldn't say anything because he had blocked me from commenting on his posts) someone posted criticizing my pal for saying Puerto Ricans were unappreciative of Trump after Hurricane Maria had devastated the island. He was half Puerto Rican himself, but he was siding with Trump while people in Puerto Rico were suffering and dying.
But sometime after Covid Lockdown began, I got a friend request from him, so he had unblocked me. I didn't accept it, but I did take a look at his page. It was shocking. For whatever reason, he had changed his mind about Trump, and was no longer a supporter. And all his MAGA 'friends' that used to cheer him on and patronize him with "wow, I can't believe a Hispanic is a Republican" had now turned against him. I saw a handuful of really nasty comments from some of them them, one had even made a meme about him calling him a soy boy and making up stuff about his sexual orientation. This after 4 years of being his 'friend.' I found out from his mother that another had even posted on her page, threatening and harassing her.
There was one person that who used to comment a lot on his page that was still being friendly to him. He was always nice to him, even though he wasn't a Trumper and even when sometimes my pal said negative things about people of his race. Not really heavy racist statements, but negative nevertheless. The dude was always patient with him though, did not get offended. He stuck by him before, and he stuck by him after.
Me? I messaged my pal and said now that he needs the Pitbull back, he unblocked me and made a friend request, knowing very well that if he hadn't blocked me before, I would have tore those people apart. Back when we were friendly on FB back in 2015, he used to link me to comments from some folks so I could do my little dance.
Anyways, the whole point of this is that these people act like they're friends, but the second they think you're not on their cute team, they will rip you apart. Now look at Politics Too and see if they attack you the same way.