On one hand, they kind of want to be, on the other they're confused, hurt that they can't help, annoyed, and mad at me: they don't seem to understand that It's not my fault. And their mixed feelings just hurt me.
I really don't think your parents are mad you because of your trauma, that would be really wrong and weird of them. They're your parents, they certainly love and want to help you, it's just that they probably don't know how. Don't worry, as you'll get better, your relationship with them will improve, because it's going to be easier both for you and for them.
Best luck :).