I feel you, this is exactly the same for my family. It literally HURTS me to think about how my Dad loves Trump so much...I think, "who is this man? This man who raised me to believe that Truth was the ultimate measure of integrity, who told me Love was the meaning of life, who helped pay for my "liberal" education." Yes, that man, loves Trump. He loves Trump enough to angrily push away people who disagree with him. I am baffled. Did I just not know him well? Or, did he change?
I go for the 'change' theory...because, I'd rather preserve the memory of the Good man who raised me.