> The nominee is quoted as saying that if the choice of a sexual partner were protected by the Constitution, "prostitution, adultery, necrophilia, bestiality, possession of child pornography, and even incest and pedophilia" also would be. He is probably mistaken, legally--but that is unfortunate. All of these acts should be legal as long as no one is coerced. They are illegal only because of prejudice and narrowmindedness.
https://stallman.org/archives/2003-mar-jun.html
he's saying that it should be legal at the very least.
Well, there is big difference between 'saying it should be legal' and endorsing.
For example, i think that drinking alcohol and smoking pot should be legal, but also think it is stupid thing to do and definitely would not endorse that.
Among the many things one can say about RMS, this is not one of them.
This is just slander.