Science is fact, therefore All humans accept it
Science says that the Earth is roughly spherical, but there are still people who believe that the Earth is flat. Scientific proof does not imply that everyone accepts that fact.
If God is a scientific fact , All atheists will "know" his existence
The term "Atheism" is typically understood to mean world-view in which God doesn't exist. By definition, then, atheists do not know that God is real. This statement doesn't make sense.
All People who are supposed to go to hell because they didn't believe in him will try not to by worshipping him
What do you mean by "believe" and "worship"?
There is a lot of confusion about the term "believe".
When some people talk about believing in God, they are discussing whether or not God exists.
On the other hand, when others (notably Christians) talk about believing in God (or having faith in God), they mean trusting Him. This goes far beyond asserting that God exists. It includes doing what He says (or what the believer understands Him to have said).
Based on these rules:
- Believers go to Paradise
- Atheists go to Hell
If "believe" means "accept that God is real", then your "atheists" don't need to worship in order to go to Paradise, because you've said that "believers go to paradise".
Alternatively, if "believers" = "worshippers" (ie. people who do what God says) then there are still issues with what you said. Why is anyone "supposed" to go to hell?
There were atheists in the past who didn't "know" his existence who will go to hell because they didn't believe Therefore God was unfair to them
Not all knowledge is scientific. For example, I know that I'm sitting at my desk, that I love my wife, etc. but I don't think science has done anything to "prove" any of these things.
Again, the real problem here is that you haven't told us what you mean by "science".
Assumptions... Science is 100% for sure (I know its not)
Your argument is deeply flawed, not least because you haven't defined your terms.
If you were writing a novel, and you define your terms to mean precisely what you want them to mean, then your argument may have validity. But in the real world... not so much.