Gaslighting - The phrase "to gaslight" someone came from Hitchcock's film "Gaslight" which starred Ingrid Bergman and Charles Boyer. Love that movie! I must have seen it at least a half of dozen times. "Are you suggesting that this is a knife that I hold in my hand? Have you gone mad, my husband? Or is it I who am mad? Yes, of course, that's it. I AM MAD!" LOL
.. push the button - they tried so many times. Little that they know, that rather than allowing it to affect us, we just hand it to God and let Him take care of it. It's the best thing to do when dealing with people like this.
Invalidating someone else is not merely disagreeing with something that the other person said. It is a process in which individuals communicate to another that the opinions and emotions of the target are invalid, irrational, selfish, uncaring, stupid, most likely insane, and wrong, wrong, wrong. Invalidators let it be known directly or indirectly that their target's views and feelings do not count for anything to anybody at any time or in any way.