It's been my experience that if these "old friends" turned on you for supporting Trump, they were never really your "friends".
Just old liberals showing their true colors to you when you did not agree with them.
No big loss. Been there, done that myself. I don't miss my "old friends" who decided their political beliefs were more important than our friendship.
My life is much more pleasant without those liberals in it.
The problem is that I also am having trouble with family. I guess I am one of many in that regard.