Tribalism is not a problem man, which had existed since millinia without any contradiction with religion or any connection with Pan-Islam or Islamic terrorism.
All the terrorist/extremist tendencies you see have emerged during the last 60 years.
The seed was sown when Iqbal raised the slogan "aik hoon Muslim haram kai pasbani kai liyai ...neel kai sahil sai lai kar tha ba khakai kashaghar" or "dashth to dashth darya bhi na chorai ham nain--Bahr-ai-Zulamath main dawra diya gorai ham nain" and Choudri Ramat Ali stepped forward and coined the term "Pakistan" which literally means "land of the faithful".
Association with religious chauvinism is sort of natural and firmly engrassed in the ideological foundations and institutional foundations of Pakistan.
When General Mahmoud Ahamd, a Pakistani nationalist, allegedly wires 200000 dollars to 9/11 terrorists or Air Chief Marshal Mashaf Ali Mir works as a point man between Al-Qaueda and Pakistan Amy or General Hamid Gul working as a Godfather to Al-Qaueda and Taleban or Hafiz Mohammad Saeed, Mualana Masood Azhar, Lakhvi, etc. promote subversion, that is not out of tribalism.
The fact is, to most Pakistanis, Pakistan with its strong army, nuclear weapons, and Islamic identity, symbolizes the power of Islam... that is where the problem lies.
It is unfortunate that more and more of internaional opinion holders are getting convinced that Pakistan cannot be transformed.
How is tribalism not against Islam? Islam was founded on the belief that the tribes of Arabia would forego their tribal mentality for a Pan Islamic idealogy.
Islam spread because the various tribes of Arabia came under one banner..