Insulting one another

 I'm reading a lot of (facebook posts) from Sunni so called (Sufi) brothers insulting one another and other Sufi scholars and salafi-nadjis too, and they are proud of it, thinking it’s great, yet the scholars say;

 "What counts are realities and meanings, not merely wordings or labels.” Consider the following poem;

There once was a sufi with beads,

Who was terribly impressed with his deeds,

The salafi, he scorned

“You’ve no purity” he warned,

With his self he was, O so well-pleased.

Hadith on Humility: Do not respond to insults like the devil does;

Iyad ibn Himar reported: The Messenger of Allah, peace and blessings be upon him, said, “Verily, Allah has revealed to me that you should be humble, such that none of you transgresses or boasts against another.” I said, “O Messenger of Allah, what do you think about a man who reviles me in a lowly assembly and I respond to him; am I sinful?” The Prophet peace be upon him said, “Two people who revile each other are like two devils accusing and denying each other. al-Adab al-Mufrad 428

“Insulting a Muslim is an act of immorality and fighting him is an act of disbelief.” (Bukhari)

Another hadith states, “It is not the character of a believer to indulge in slandering, cursing, or immoral talk.” (Tirmdhi)