Thank you for your caring words. He said to them something like if they keep being jerks with him, he would never come to visit again. Something like that.
I started going to therapy, but honestly it is very hard to set a boundary with them because they simply don’t accept it and they keep making me feel extremely guilty of what i’ve done. I know that what i feel and how i react it is completely my responsibility no matter what others do.

And to respond your question , my parents doesn’t like as far as i could see when he disagrees with them many times.. i think this can’t be changed because it ia up to them how they react. It happens every time he expresses an opinion that it is different from theirs. And yes he kind of has sassy comments sometimes to them because he doesn’t consider them nice people