There are laws in some countries against Holocaust denial, but I've seen denial of many other atrocities that could also merit laws.
There's Armenian genocide denial, Holodomor denial, Nanking Massacre denial and also many denials of how bad the colonial empires of Europe were - that's to name just a few. There's many denials that go relatively unchallenged. I'm reading about the history of Renaissance Spain at the moment. I've seen people arguing that the Spanish Inquisition was necessary
And that Las Casas was making stuff up regarding all those Taino who were killed and enslaved. I will admit that the Black Legend against Spain in countries like England was mainly politically motivated and that Spain was no more morally repugnant than other imperial nations, but I'm still surprised by how much people are ready to excuse.
That said, I do not support laws against denialism. I'm in favour of free speech and I think even hate speech should not be criminalised. Plus, the Internet is hard to police. I just wish more people were aware of how many different forms it takes.
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Zombies, zombies will tear us apart...again.