So you don’t want to debate at all then, just proselytise your beliefs, using irrational arguments, then use vapid evasion when these are pointed out. I have not claimed, or even implied, to be certain about anything, so your quote (from a famous atheist) has no relevance I can see. You’re the one making a claim for an extant deity, the burden of proof is yours, I am simply dubious and disbelieving.
I have not asserted that at all, ever, with or without certainty. So this one is called a straw man fallacy.
Existence is defined as being alive or part of objective reality, you seem to be placing the deity you imagine to be real outside of this definition.
existence
noun
the fact or state of living or having objective reality.
Care to explain why you believe something exists, and simultaneously define it in a way that negates this?