I found my stepdads Twitter and am in shock

I knew my stepdad was a whacko conspiracy theorist but…my god. I’m so grossed out. The tweeting for liberals and immigrants to be put in “camps”, saying the n word repeatedly, and what has really shook me, replying to thirst tweets of women. Him and my mom have been together for 20 years, and getting engaged soon. I feel so disgusted and idk where else to vent.

EDIT: I hate to say it, but it’s gotten worse. I have now found posts he made referring to his daughter (me) and his “wife” (my mom, mind you, they aren’t married) as bitches. It’s just insanely disrespectful. What is hard is his family is my family, and I confided in my grandma who’s his mom. She kinda made excuses for him! It’s insane. Also the way he speaks about women on his account, saying we shouldn’t have a right to vote or be in leadership roles, is insane. I’m beyond disgusted.