What would need to happen for you to be able to distguish between a God and more advanced technology.
As most have said: evidence. However, just because god proved to me he/she/it existed, doesn't mean I would want any part in following/worshipping him/her/it. There's a lot of evil in this world that god would have to explain before I even considered supporting such a being.
Evidence. Anecdotal evidence is all that has ever existed. When God supposedly sent Moses to demand the freedom of the Jews, the story says he sent down plagues upon Egypt that every person could see with their own eyes and experience for themselves. When you ask a person of faith why God can't do something like that now, they will tell you. "Oh, the system has changed. Now you have to be saved by faith, and if there were proof it wouldn't be faith." --- Such rubbish.
Same things that makes me believe in France or Radio-waves or anything.
Credible proof - ideally him (her?) making their holy text appear in the hand of anyone who asks, written in their own language. Wouldn't that solve every question about the right god and the right version of that god's holy book? (Question for believers - why not do that?)
I've thought about this before. At the very least, I'll tell it this, "I'll just keep asking for evidence and for us to define our terms: what makes a god a god and not just a being with better loot and skill-trees than me." I'll Tom Sawyer that som'bitch: If you can paint my fence without using a brush, I'll be a little closer to "believing." If a god is simply something with more capabilities than us as a species, then you get your win, buddy. You're the fart that pooped gold, now go god somewhere else. That's the thing with questions like these, when you say "god" what exactly do you mean? If anything we still have to work on the premise of this discussion.
If he comes down from whatever cloud he lives in and knocks on my door with a pizza. He'll have to give me quite a magic show and mind blowing proof that he's not of this world. I'll still have to go through a scientific process to confirm he's a god and not an alien. Or, a member of X-Men.
Nothing! There is on endemic evidence in the existence of a god or gods. They are a construct of the human mind, looking for explanations for the world around them, mostly in a pre-scientific era. Unfortunately, religious organizations have become so rich and powerful that they keep brainwashing people, especially children, into believing that there is a god, and that science, (which is provable), is the lie.
There's an important difference between belief and worship at play here. If I saw a god appear in the sky, and so did everyone else, and there were no other logical explanation, then I would accept that this god existed. If this god were anything like the God of the Bible or the Qur'an, then that God does not deserve to be worshiped.
Well if God was real when people pray things would happen but they pray after a disaster. I.f God was real there would be no need to pray because the disaster wouldn't have happened in the first place. He is supposed to be all caring and loving but look at the world.