Thank you for your input. You seem to genuinely mean well, so I appreciate it. You may be right that they don't hate me, but when you get called "obscene" and they refuse to associate with you, it gives the impression. As for my cousin's death, it just hurt me that they never left him alone. He had never been religious beforehand, and I just wanted him to be able to enjoy the time he had left instead of being preached at. He did start doing Bible study and such at the end there, and they gave him a witness funeral. Maybe he truly did convert, I suppose I'll never know.
I'll leave it there because I don't want this to turn into a debate. (Also it's not my parents but my mom's extended family. I was just raised in large part by my grandma and my aunt, so they had their influence. My mom is pretty secular and my dad's side is Jewish, but also largely secular).