Is it normal that i think about killing my brother everyday?

I've lost all respect for my brother. He beats his girlfriend and he pushes my mom and he gets in fights with me all the time and will actually throw punches at me. I've gotten a fractured jaw because of him. He has severe anger issues and I feel like I'm walking on eggshells in my own home because of him. I never know what to say or ask because he blows things out of proportion. Hes 17 and got his girlfriend pregnant and he doesn't even care to get a job or go to school. He treats me like shit everyday and I have no confidence because of him. I think about killing him everyday but I'll go to jail for it. He's fake in front of everyone but at home he's worse then my father ever was. I hate him so much. Is it normal for a 19 year old girl to hate her brother so much? I imagine different ways of killing him everyday. I've laid in bed for hours thinking of it