are humans allready defeated by demons, as the bible says?

Umm no. you demons fear us so the only way you can win over us is by corrupting us, and those who believe in the TRUE name of the TRUE creator will rule over you demons, and you will burn forever. You think we can't fight you but guess what, YAHUSHUA can have you leader and destroy him. I'll go after the minions and beat the crap out of them. :)

Many religious texts say many different things, none of which can be proven. Seeing as how I have never met a demon that I was aware of, and you likely haven't either, than I would say humans are only defeated by themselves.

All religious texts were written by humans, all with the intention of taking the "sting out of death." Promising something that can't be proven, such as an after-life, is a very successful tactic in recruiting members. Providing an answer to the biggest question of history, "What happens when we die?," caused a mass flock of the uneducated population into religious sects throughout the world.

I hope that you can see what I am trying to say, and know that the claim of "demons will rule the earth" is just as legitimate and illegitimate as any other religious claim in any so-called sacred texts.

If in the end demons shall rule the Earth, then why are all the Christians trying to make something of the World? Why don't we just give up. I mean, they are going to destroy all we built anyways.

Are the demons known as religion?

No because there are no such things as demons and the bible was written by men. Sorry.

If you don't know the answer to this, you have clearly never been married.

Depends if you believe in fairytales or not. Either way, no.

I wish I am a demon.

Sure does seem that way.