If anyone tries to tell me the holohoax actually happened I simply link this website and tell them they are free to refute it or are free to keep living in fantasy land.
https://holocaustdeprogrammingcourse.com/
If after reading that website they still believe in the holohoax they are a lost caused and not worth the time and effort.
If they are trying to spew bs lies about Hitler they are more than likely never going to listen to the truth and are not worth the effort. That is the reality of the world we live in, most are so brainwashed they are never going to listen and the best you can do is give them something of the truth and let them decide whether or not to read it.
"You can lead a horse to water, but you can't make it drink."