I take it seriously. Evos can call those who believe in creationism all sorts of names and insult them. Turnabout is fair play.
I have experienced the rather rancorous exchange between the two sides, and the turnabout may well be justified. But being justified is not the same thing as being right. When you start your argument with an insult, most readers tune out, the ensuing discussion will convene with only the name callers involved. If that's what you wanted, the go ahead.