Ignorant people that refuse to learn.
Ignorance isn't the same as stupidity. Ignorance is basically naïvete without the incentive to learn. People who go around preaching their opinions of something they know nothing about is one example (politics, is a repeated offense). Stupidity? That's in your genetics.
Abuse, be it to man, woman, child, animal, immigrant, illegal immigrant, alien, or tidal wave; emotional or physical.
Homophobia
Pedophilia (Statutory rape laws are bs)
Necrophilia
Zoophilia
Eisoptrophilia People who state their opinions, and then listen to yours so they can ridicule you.
People who wish to discuss religion, and then delight in telling me I'm going to Hell.
---A sure cure? Saying, "I'll see you there."
Christianity I've been there, done that, and gotten the teeshirt. I have no interest in being re-brainwashed, thank you.
Also, I'm slightly afraid of spiders, but I don't kill them.
Marquees and blinky text lead to fits of homicidal rage.
Solecism Cacography
I hate many things. Sue me. For those of you who have a list of things you hate that even Moses would be proud of,* I have one thing to say to you: shut the fuck up and deal with it *-See below for explanation.
*Generally makes no sense.
I know you're faking it, but that's okay.