Creationism

[Belacqua]

None of them state that all things that exist must be unconditionally caused, therefore god.

Maybe it would help to state the opening premise in each way, and see if that premise itself is open to challenge.

1) The potential in anything can only be actualized by something which is already actual.

2) A thing cannot be the efficient cause of itself.

3) If there had ever been a time when nothing at all existed, then nothing could have come to exist. 

Each of these, on its own, should be addressed before anybody needs to bring God into it.