the best proof one can give you of God actually existing is at best an a priori argument based on their personal belief and upbringing.
The existance of God is almost by definiton unprovable by any logical identity we as humans are able to think of. That's why the word faith exists.
Be the fact that all religions teach humility, caring for others and the nature itself we all know from past experiences (or even history as a school subject) that even the most religous (of any faith) destroyed nature and other lives on the path to their own goal.
And I rarely see anyone religious complaining that global warming is a myth, however I often see "hard-core" cristians ( forgot how they are named, something like creationist) trying to dispute the fact of evolution, existance of other "homo" genus creatures (like previous human types) or (this is the best) the fact that Earth is older then 5000 years(or something like that). Why? Because they turned their religion into ideology that then prevents them from even trying to understand why is something ALMOST even above just theory.