It gets even worse when you find that asking questions about this specific historical event can get you considered "anti-Semitic" just because you were asking questions, inquiring about evidence presented is considered a "dog whistle". I've known many "holocaust deniers" and nine times out of ten it started out with them being presented with counter-evidence to the "official narrative" and instead of being treated like human beings they get called evil, told not to ask questions, and get shut down instead of having their concerns addressed in a kind, loving way. When getting slandered and abused it makes it much easier to justify leaps and make assumptions and go down a bad path.