What is the weakest theist argument?

[Oli]

It seems like you are stating that establishing the parameters of a people's expectations is the best way to control them. The actual expectations are cultural, technological or just relevant to time/place.

Religion was/ is one of the cultural factors of control, so yes, expectations are cultural.

So why would atheists, overtly denying God, not be exercising control in such a manner that some argue brought them to that belief?

Not be exercising control?
Sorry I don't understand the question.

Basically, atheists argument being "believe what you want but support that belief with this (scientific) doctrine?"

If it has evidence then it doesn't require belief.