If i was convinced that his claim were true I would accept his existence, but not worship automatically. Unless he could prove that the Biblical interpretation of him was false, I would have to tell him how much of an immoral ass he comes off as.
I guess varying shades of in the middle would've been more appropriate, but I was interested in hearing how many people would've told God to "shove it". I certainly count myself as one. I think all gods outlive their usefulness. The monotheistic religions gods have certainly gone way past their prime. If gods can "live", then I feel nothing can be right unless that god is in a mythological graveyard.
I can't imagine this scenario so if it actually happened maybe my entire worldview would shift and I'd want to worship him or something but as for right now, I mean he'd have to do something to prove that it was necessary to worship him or else I'd really go to hell, which apparently now does exist, and he'd have to tell me which religion I should be following and how exactly the appropriate way to worship was. LOL.
If a god (either the Christian one or another) did show up and managed to convince me of its existence (as opposed to being a dream, a hallucination, a trick propagated by advanced science, etc), I'd believe it existed, but that would by no means translate to worship. If a deity wants to be worshiped, it had better be able to show good reason why it deserves such attention. the Christian god, as portrayed in the Bible (and by a number of his followers) certainly does not qualify.