A Sustainable Conclusion?

I honestly believe that 99% of however many people actually read my posts are going to laugh aloud and dismiss this to the absurd quantity of beer topped off with a Jameson and coke that violated a cardinal rule last night, but if theism is irrational – what says the rationalist of denying the irrational?

Atheism must be irrational if its aforementioned premise is true! I know that sounds preposterous, but please give it a chance. I'm being dead serious, and if I'm arguing from some sort of fallacy or misunderstanding, I'll shamelessly swallow it like the aforementioned adult beverages.