From the site guidelines:

> Be kind. Don't be snarky. Converse curiously; don't cross-examine. Edit out swipes.

> Please don't fulminate. Please don't sneer, including at the rest of the community.

> Eschew flamebait.

> Please don't post shallow dismissals...

That's why that comment was flagged. (To me personally, your comment was harsh enough to be worthy of downvoting, though I'm not sure I would have flagged it.)

Also from the guidelines:

> Please don't comment about the voting on comments. It never does any good, and it makes boring reading.