I'm directly addressing your questions while all you seem to be doing now is dancing around them and getting more defensive.
You told me to go look in a dictionary for the meaning of THEORY (your emphasis) yet you don't even seem to understand why big bang and gravity are both THEORIES, while religious beliefs have non of those attributes, which means your initial comparison is a complete red herring of false equivalence. That's all I was explaining.
There have been many thousands of Gods since human kind began, now if you don't know that much then your turn to go look that fact up.
By your own admission you are a disbeliever in all those Gods, therefore by definition you are a disbeliever in those religions and their deities.
You disbelieve in all Gods except your own. In that regard you are a disbeliever but then on the other hand, also a believer, who believes in just their own one God.
Believing in one thing at the same time and not other things of the same ilk means they are not mutually exclusive of each other. It's really not that hard a concept to grasp except you seem not to want to say you're a
non-believer in all other Gods except your own.
The very notion of vicarious redemption by killing your own child especially, is abhorrent to any sane person. That an imaginary God is supposed to have done that is in no way an excuse for harboring such ideas worse still as sacred.
Your God is said to have sacrificed his son Fri thro Mon (though absurdly according to Christian dogma, the son is supposed to be the God anyway, so really it was suicide) so just for the weekend then.
Happy Easter!