I've heard those not religious still hold some things in scripture though without god context: do into others as one as you want others to do for you.
Are we treating ourselves as idiots, stupid etc when we accuse others as being so?
Who are we actually calling idiots?
The "Golden Rule" does not translate to: "anything you do to others is something you want done to yourself." So, by judging someone an idiot, it is not like you simply MUST implement some form of "The Golden Rule" and admit that you treating someone like an idiot equates to you wanting yourself to be judged as an idiot.
The Golden Rule is a prescription for "thinking ahead" as you go to take an action, and if that action would result in things happening to the target of your action that you would not want done to yourself, then perhaps think about it a bit more and make sure it is worth it for the damage you might cause. Not only this, but I believe that when you take such an action, you must be ready for any backlash that might be forthcoming - because as you take the action, you must necessarily realize that others can also take that action against
you, and if you don't want that kind of retribution on your hands, perhaps another reason you shouldn't engage. And lastly, probably the most intended meaning of "The Golden Rule" - if you treat others well, you can pretty much expect that they will treat you well in return. An actual prescription to treat others in the ways you would like to be treated, to make sure everyone is happy with how they are being treated.
But in no way does it define some cause and effect scenario whereby what you do or say is exactly what you want done or said to you. Not in the slightest. People do things
ALL THE TIME that they would not want done to themselves... and they aren't sitting there thinking "I really wish someone would punch me in the face like this." But, it is my personal opinion that when a person
DOES get punched in the face in retribution to their punching someone else, to be surprised that such has happened is a sign of low mental faculty. They didn't think about it, didn't "apply The Golden Rule", etc. In that way The Golden Rule is a sort of prescription against hypocrisy. What's good for the goose...