It is a common thing in many legal systems in Europe. Nazi/Soviet/Other victims and their descendants consider it defamation to deny various genocides or to pro

It is a common thing in many legal systems in Europe. Nazi/Soviet/Other victims and their descendants consider it defamation to deny various genocides or to promote particular symbols. The law you have mentioned is essetially a short-cut for legal defense against slander, and also an honorable and a fair way close the sad chapter of WWII. This is on a certain level very similar to positive discrimination regulations in the US. One could say - declare a law that states it is illegal to discriminate basing on race, gender or sexual orientation. The problem is that such a law is too weak - it does not serve its purpose in practice. Similarly, the generic and good anti-defamation law needs support in the most extreme cases.