Why are people who hate/disbelieve astrology so zealous in their disapproval?!

Why are people who hate/disbelieve astrology so zealous in their disapproval?

If you don't give it any credence, why answer questions in a section about it?

2 months ago
"And God said, Let there be lights in the firmament of the heaven to divide the day from the night; and let them be for signs, and for seasons, and for days, and years:"

- Genesis 1:14

I've tried that one before, the best you'll get is chainlightning giving an elaborate explanation as to why "astrology doesn't work" copy-pasted from a site.

They're overly zealous in their dissaproval, but when you ask them to explain why, they always come short - incredibly short, due to lack of knowledge about astrology, and narrow-mindedness.