Anyone who contradicts him gets a hateful response from him, mostly leaning towards "You're an idiot for not understanding Astrology, so therefore you can't tell me I'm wrong."
He also contradicts himself a great number of times too. He'll say things like "Well, anyone who follows astrology doesn't think for themselves." then he'll say "You can't understand astrology, it's the most useful thing ever to give advice for your life!" or something.