"don’t start fights on people’s posts with negative comments that are not feedback, but judging. You look stupid. People here that post and do something “wrong” in your eyes are still learning and deserve positive feedback."

Insults aside - if you cannot live with an opposing opinion, you should not write your own opinion to the internet. Simple as that.
"Judging" an opinion of someone else does not necessarily let look one stupid... this mainly depends on the content, that is judged.
And if this content is stupid or even dangerous, how can you justify to call for "positive feedback"?
Overexaggerated example: How much positive feedback would I have to give to a child abuse group talking about their torture strategies to not look stupid?