Thanks, Tim. I know that he is going to die. What I needed to know is that all this fighting and aggressiveness is going to end. He doesn't know (at least nobody told him) that he has cancer and that he is dying, but I think that subconsciously he's realized and maybe that's what he is fighting against.
I was already living with them (although I was on the process of renting a house) when he got hospitalized and diagnosed, and my mother was a nervous wreck so I postponed it. Actually, although leaving will be the best for me in the short term, I know that I will regret that decision later on. So I will stay here. I don't think he has many more months left...

P.S. I'm sorry about both your parents. I'm sure you did the best with the circunstances that you were living. I wish life were simple and that decisions were balck or white, but they aren't.