“for the believers in God, they don’t make the argument that they know for certain that there is a God; for the “theists”, it’s about “faith”, and faith is never 100% a certainty.”
So you’d categorise most believers as being less than 100% sure that God exists? That wouldn’t be my experience and sounds like you’re saying most believers are agnostic to some degree or other.
An understanding of what can be known and what we accept as known is important here, it seems.
Do you know other people exist—people other than yourselves? Then I ask you to please present evidence that what you perceive as other people are not merely hallucinations.