I like that.

Actually, if the belief of atheists is "I don't believe god doesn't exist" that's a double negative, and if you cancelled them out would literally translate to "I believe god exists" I don't think that's what they believe, although I have heard some of them say that Atheist means Non-Theist, and so they're basically agnostic.
I rarely get to correct you, so I couldn't resist the temptation.

I thought Atheists didn't believe that god exists, and Agnostics believed that there was no proof that he does or doesn't exist. But I'm probably wrong.

You were right about Atheists, he was just grammatically incorrect, he knew what he was trying to say.

And Agnostics are usually... waiting for proof of existence. ^_^

Yeah, typo on my part.

I have to sort of clarify my response to this question.

There are two conflicting definitions of the Unitarianism. One is often and erroneously used ro describe the United Church of Christ which is an extremely liberal adjunct sect of Christianity that differentiates itself from all mainstream denominations of Christianity in its rejection of the Christian doctrine of the holy trinity.
There's also the Unitarian Church which embraces and teaches the core principles of all religions, but subscribes exclusively to none, and doesn't seek to promote any religions dogma or doctrine. this is a good summation of my beliefs.

Also, the Baha'i faith preaches that all religions worship the same god, which is contrary to what Hindus believe, but the theme is world peace, and that all religions are right.
It also says that Moses, Jesus, Buddha, and Mohammed were all essentially equal in that they were all messengers of the one god. Pretty great religion.

Yeah, Baha'i is a very awesome and interesting religion that I've been meaning to learn a lot more about.

baha'i is a nice idea, but kind of self-defeating. it basically ends up being a diluted version of islam with the slogan "world peace!", which is probably still better than most religions.

So they believe that god told many messengers to create different religions that would then start fighting and killing each other for many centuries?

Who wants to worship a god like that?