Family doesn't always have a place. Even (perhaps especially) on social media.
I'd always known my brother was very conservative. It wasn't until I joined FB that I discovered just how batshit insane and prejudiced he was. Some people say 'well, it's only politics' but no. It's not ONLY politics. It's a very clear indication of how that person think. What he believes. What he values. What type of person he is. As an example...
When Nelson Mandela died, he posted something like this (I forget the exact wording but trust me, this was the gist):
Thank you for your role in creating a nation with the highest percentage of black men raping white women.
It's axiomatic that when someone mentions rape and race in the same breath, the issue is never the rape and always the race.