This isn't that; discussion and debate is promoted here. What's not is exactly what you've just demonstrated - vitriolic language that only serves to provoke hostility and muddy the waters of real conversation.

You could have gotten across the same message by saying something like "Sure, being rude is bad, but you shouldn't let politeness descend into agreeableness to the point where people are shying away from real conversations in order to avoid upsetting people". Same message, much better tone.