Its the same old “holier than thou” attitude and the “judgmental” attitude that Yiddin seem to have. Instead of understanding our obligation of “v’ahavta l’reiacha k’mocha” we are always busy with what’s right about us and wrong about the next guy. We lack the common aspects of respect and therefore feel it is OK to knock our fellow Jew.
So I suggest we practice RESPECT on a more global level and not letting all our thoughts escape our tongue or our keyboards. Take two deep breaths before speaking or typing your thoughts and think “how will what I am thinking be heard or accepted by the other person?”
Also without having to go to each other’s Rebbeim just keep in mind how your respective Rebbeim would greet each other or speak to each other. Would they speak to each other or even think about each other the way you do? And “Da l’fnei Mi Atah Omed!” each time you say something rotten or do something not nice remember that you are standing before Hashem and think about putting another weight literally on the aveirah scale because Hashem sees everything and knows everything we think and do and WE are judged for each item.