Talk to your mom dude. Ask her why she feels the way she does, and then do the best to change her opinion. Sit her down and tell her you really want to talk to her. Let her know you're serious. It would help if you've been generally a "good" kid, and you have a steady job and/or grades. If she used to be in to it, she obviously didn't buy in to the bullshit. Just ask her why she feels the way she does. And good luck.