Everyone has a right to speech, even speech that is not good. That applies to gay people at Stonewall and the KKK marching in DC equally.

If you would restrict one then you restrict both. The freedom is absolute or it does not exist for anyone except the current favored group.

It's like laws on the treatment of prisoners of war - we don't have those rules because we love our enemy, it's because we want our brothers to not be tortured.