Yes, Monika Schaefer was arrested, fined,and imprisoned for just that.
Frau Schaefer, like ALL Revisionist was once a True Believer.
Have a look at the video link below.
"Only lies require censorship".
Sorry Mom I was wrong about the Holocaust (5:50 min video)
By Monika Schaefer
https://codoh.com/library/document/6942/?lang=enGerman Canadian Monika Schaefer realizes that the Jewish Holocaust is a fraud and regrets having been sharp with her German immigrant parents, blaming them before for ‘not having done something to prevent the Holocaust.’ Now that she realized the Holocaust is a fraud, she is apologizing to her dead Mom for having been so unjust to her and telling the world what a deception the Holocaust is.