all the evidence points to one God.
Yeah, like "evolution is impossible because it's obvious that anything as complex as life must have been designed and built by a supreme being". Oh, wait - that could have been done by multiple gods.
OK, well, how about "everything has a cause, and therefore there must have been an uncaused "first cause" to start the chain. That First Cause is ... " Uh, OK, so there could have been multiple gods, each one creating the next ...
Alright, let's try: "many have had religious experiences that cannot be explained by material cause; therefore, this is evidence of God." Darn! I guess multiple gods could do that, too.
Well, how come we have morals? Isn't that proof that God must have planted a moral sense in us? I know, I know, God is supposed to do a whole bunch of other stuff besides give us morals, and I guess there could be a god of morals and a god of health and a god of the earth, etc.
OK, I tried to help you Scott, but I'm out of arguments. You'll have to come up with all that evidence yourself.