I always find it strange when theists retreat to "yeah, but you can't prove my god doesn't exist!"Of course they are irrational.
I can prove a negative, "Sheldon didn't put butter in the fridge" by simply opening the fridge and having a look.
You are claiming that NOWHERE in the UNIVERSE is POSSIBLY a God, which is a statement of eyes big enough to see the whole fridge (omniscience) and is utterly, of course, irrational.
I'd consider you rational if you were agnostic or just like me, a lover of Jesus Christ, or somewhere between.
I mean, they've basically abandoned any argument that their beliefs are justified and are hedging their bets on the fact that sometimes - rarely, but not never - claims that we just pull out of our butts wind up being coincidentally true even though we had no reason to presume that they would be.
It's... interesting to hear stuff like this from someone who has made a theistic religion the centre of their whole life.