To be honest, I got angry and clicked the downvote arrow without sufficient consideration, then thought (since I couldn't undo it) that the civil thing to do was to explain.
EDIT: s/like your/like/g (unintentional ad-hominem)
PG has said that downvote to disagree is acceptable.
Can you point to anything in the guidelines or introductions or faqs about not downvotig for disagreement?
Since it's impossible to eliminate downvotig for disagreement you may as well just let it happen.
I've advocated your same guidelines in the past, as they promote a healthy site/forum, but they are not HN's guidelines. PG has actually encouraged the antithesis of your guidelines in the past, so I'm compelled to tell you as much.
Edit: ah. Everyone assumed I was talking about ggparent's spiritual beliefs. Amazing how a sole personal pronoun can alter intent.
Don't down vote people simply because you disagree with them. Just because you don't agree with their opinion doesn't mean it should be hidden from others. Use the down vote to hide comments that don't add to the discussion.