He wasn’t factually disagreeing with anything, he just thought that people were “screeching” too much about genocide.
This I agree with in general, and I don’t think debates on forums like this accomplish a whole lot when it comes to raising awareness about genocide one way or another. The only thing I think is really productive is personal stories. Genocide and genocide minimization are both only possible because people are capable of dehumanizing “different” groups of people.