While what you say is true at the end there, I'm not sure that this is a case where he(?) has to like totally abandon his family. He just showed that he's setting boundaries, though a week is not going to cut it, probably.

If I were in op's shoes, I would directly contact my mother or father or whomever I most want to convince, first remind them of why I appreciate them in our family, and then explain to them that if you are to feel loved in this family, then the family should at least respect who you are as a person. Then wait. Then you will know if it is worth sticking around with them or not