If God was going to talk to anyone , wouldnt it be more sensible for him to talk directly to the leaders/heads of all the nations and telling them straight out whats going to happen to them and their people if they dont toe the line .? and educate their people to worship him ?
Why beat around the bush and talk to a couple of Christians who nobody takes any notice of anyway, because their is so many conflicting versions of the so called truth.
God should look at the movie "The Day The Earth Stood Still " original version ,he might then have some success.