the demons believe in one God and His existence, but some humans don't. Now bold the demons and the human who don't, whom of them is right?

Everybody is wrong. You have false religions on earth, false prophets and only enslaving lies. People are lightyears away to the truth and that will make the step to the next level of existence much more difficult. Some leading people want the world population to stay at a mental and spiritual unknowing level...and obviously, it works spendid.

How do you know what demons think, anyway?

James' point, which you obviously have missed, is that "faith alone" is devilish, James 2:19-23.

LOL...care to offer any proof for your ridiculous claims?

Bold? 'Atheos' described by the Greeks in about 600 BCE no doubt goes much father back in history. It would be interesting to chat with a Christian from 1100 CE, yes? What would they say about demons?

Why did the mountain erupt in fire? Why did rock slide kill 6 goats. Why did the tiger take the child. Why do skin lesions consume flesh and spread to others. Our ancient friend explains to us about angry gods and demons. You buying that ?

There is no such thing as demons.

Demons exist only in stories.

Gods exist only in stories.

Humans do actually exist. Not only in stories.

You can learn how to tell fiction and reality apart, too.

Since demons don't exist, humans win by default.

Guess what, many of us humans don't believe in the demons, either, so we don't see how they could be right. Perhaps if you could demonstrate that the demons exist, we might be convinced of the existence of God too.