I don't think it's wrong, because by "a slight" I imagine you mean a relatively reasoned argument directly against it, which is fair. Creationism is ignorant, out-dated mythology, and anything that tries to bring people's minds around to more enlightened understanding can't hurt. If by "a slight" you mean an actual direct insult, I guess I agree with Sean: it's unprofessional. But I wouldn't actually feel too bad knowing it happened because I hate Christianity and it annoys me when people believe in that crap.