You can ask Iago how well that works.

So you're telling me that because I am not afraid of a man whose single greatest act to date to separate himself from his 'Muggle' father was to invent a name for himself even more ridiculous than the word 'Muggle', I'm not qualified to educate you. The fact that you cannot talk about him as though he's a person without turning whiter than your hair suggests that perhaps you are not so qualified to educate me on the subject.