huh. yeah me and my parents don't get along either- especially my dad. i dunno why. i won't get into that. my whole family doesn't like me for reasons that vary from person to person, but it's basically the same reason, it just affects people differently. like i can't have knives. but here's my theory-
1) hate is natural. you CAN truly hate somebody. maybe you hate your dad. maybe you don't. you have to think about whether you finally said what you've always felt, or you simply don't like him, and you snapped in a tough situation.
2) hate isn't healthy. trust me here. it wipes you out in a bad way. you have to put it aside, don't let it dominate you.
3) if you find out you do hate someone, truly, you can't stop it, you need to figure out why. something has to change- they say no one can hate forever, they're wrong- just sometimes forever is shorter for some people. If you know you hate him, you have to deal with it. Not just one of you, but BOTH of you, have to change. you have to confront him, (he probably doesn't think you REALLY hate him- parents rarely do) and let him know. try to figure out why, or if you know why, try to tell him why you hate him so much.
4) if none of this helps- or you can't, for whatever reasons, try to do anything- find someone else to talk to. yeah, i get that your parents are almost always (always, in my case) the last people you really want to share something personal with that concerns them. but you'll probably explode if you don't talk to someone. i mean someone real, in a real conversation, with real people, where you can smell what they ate but you don't care because you have someone to talk to. THAT is who you need to talk to.
hope this helps.