In France you can get imprisoned for holocaust denial. See: https://en.wikipedia.org/wiki/Laws_against_Holocaust_denial

Art 9. – As an amendment to Article 24 of the law of July 29, 1881 on the freedom of the press, article 24 (a) is as follows written: <<Art. 24 (a). - those who have disputed the existence of one or more crimes against humanity such as they are defined by Article 6 of the statute of the international tribunal military annexed in the agreement of London of August 8, 1945 and which were a carried out either by the members of an organization declared criminal pursuant to Article 9 of the aforementioned statute, or by a person found guilty such crimes by a French or international jurisdiction shall be punished by one month to one year's imprisonment or a fine.

While I don't agree with that law, it's the opposite of what I was talking about.

In Turkey you literally can't admit that a genocide happened.