Is this my fault?

I just graduated with my masters and my family wanted to celebrate to congratulate me. Everyone seemed really happy for me but I caught my cousins speaking badly about me in the other room telling each other that they now think that I think I’m better than everyone because I’m the “most educated and whatever.” I confronted them asking them what their problem was and they begin to attack me saying that they should be being celebrated because one of them is pregnant with her third child and the other just came out. This caused a huge situation with our family and I now feel awful. Is this my fault? Did I do something wrong?
Is this my fault?
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