Please help, how do I stop being aggressive and abusive to my girlfriend?

We been together for almost 2 years... When she gets me mad I just immediately snap and something just takes over... The stuff she does to make me angry is never letting me have my own opinion or point of view, she forces her religion on me, it's like walking on glass with her, the smallest thing well make her scold me and then I get angry... When we fight, instead of letting me calm she'll keep going and continue running mouth with person attacks and negative verbal abuse.. I'll warn her so many times to leave alone so I won't get aggressive but she keeps going and going... Before I lay a finger on her, she'll start ripping one of my posters, or she'll go to the closet and start ripping her clothes up.. If we're in the car she'll literally start throwing a tantrum
And start screaming and shouting on the top of her lungs and pull and slap me and kick the crap out of my dashboard while I'm driving. She'll try to jump out moving vehicle and gotta pull her back in ...