The point of a "false prophet" is that they claim to speak for/act in the name of God for their own (evil) ends. False prophets are the highest tier of grifter in a religious context.
We are all the products of the universe that created us. To understand them you have to first understand yourself, why you believe what you believe, and then understand that they lived a life that furnished them with their beliefs. But that will only get you halfway, as you will begin to understand them but that does not extend both ways; they will still not understand you. That will take considerably more effort.