I think that is wrong. I have debated with Holocaust deniers before. It is laughably easy to debunk their arguments. Denier brings up canned argument #5: Dachau

I think that is wrong. I have debated with Holocaust deniers before. It is laughably easy to debunk their arguments. Denier brings up canned argument #5: Dachau had no gas chambers. A coherent counter-argument can be googled up in 15 minutes. Denier then moves on to canned argument #6 and you repeat the process. Time consuming, but not hard at all. They are so stupidly easy to expose that banning them just makes them appear more powerful than they really are. Denialism isn't unique to the Holocaust either. It is used in lots of countries to try and cover up their less than stellar past.