They resort to throwing pies in the face of their opponents.
Archbishop Leonard of Brussels, Belgium, has been targeted for his stance that AIDS spread through risky sexual behavior, at that a large part of that spread had to do with the homosexual culture of the late 1970s. This is factually true, but he is being assaulted for it.
This is what happens when reason breaks down. For now, it's just pies. He's also had lawsuits thrown at him. In the future, who knows what sort of violence will break out (and be justified as "retributive justice" or payback for past grievances)?
You can read more about the attacks here.