Psychopaths have the ability to not feel other people's pain. Super important distinction. Unless you're just hate-mongering. In which case sure, they're as good a scapegoat as any.
My notion of these people (developmental and increasingly genetic) is that they exist as the scar tissue of humanity. I fear this new propaganda will only leave more scars than the old.
I think we all have the ability to not feel another's pain. For instance, dehumanization is a classic technique in war propaganda.