If these resident theists really talk to god..

[Mister Agenda]

Because even if we did any or all of those things, you still would not be convinced. You can always find some reason to not believe.

Well, a mere video of someone supposedly doing that shouldn't convince anyone with half-a-brain. It would have to be under controlled circumstances, and no ethical person would allow someone to drink something deadly if it could be prevented. Our skepticism isn't unlimited, though. There's a million-dollar prize for anyone who can perform a miracle (or magic, or ESP) under conditions that don't allow trickery.

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Personally I would rephrase their points as, Even if you did believe, you would still rebel, so god has no reason to do these things. Many atheists openly say that even if god were proven to them, they'd want nothing to do with him. It's not an unusual position. So, it's disingenuous to pretend that it's just a matter of evidence. James noted that the issue isn't believing in god's existence - the demons believe that much.

Double-edged sword my friend: these demons are proof that knowledge of God doesn't take away free will. On that note, shame that God won't go beyond just authoring a less-than-perfect book in order to establish his existence. It's as if he doesn't exist, or doesn't care enough to show himself beyond doubt such that the question now becomes "to follow Jesus or not" instead of "to follow Jesus or not... or Buddha, or Confucius, or Mohammed etc".

An actual demon would be excellent evidence of the supernatural, and good circumstantial evidence for the existence of God.