I have to confess something to you. I hate jehovahs witnesses and not because they're simply annoying.
Why do you hate jehovah's witnesses? Why do they annoy you?
They bother me.
While it could be annoying to have people knock on your door, it is wrong to feel hate for this sort of thing. Feeling that strong of a reaction towards them is just going to hurt you.
I also hate christians, muslims, atheists, and pretty much anyone who isn't an atheist/agnostic.
Most people would expect you to attempt to be more tolerant of other faiths. While you don't need to agree with them, hating that many people can't be healthy.