What "intishaar" and "fitna" has Ghamdi spread? I would really like to know?
As I recall you don't like long answers - so I'll keep it short???
ٖFirst, he has been preaching that tassawaf is outside of Islam and at maximum a "parallel religion". That mean he has put about all of Islamic sects and history out of Islam. There is so much genuine criticism of "practice" of tasawwaf through history and much is justified but none (including wahaabis) take this position. Wahabi's opposition to tasawwaf is based on different reasons, i.e. wrong practices and inclinations and danger towards shirk (and I have read Wahab's writings).
Let alone Pakistani sects like barelvi, devbandi and others or shias. about all other sects through history as well - all had been practicing what is NOT Islam!!!
What about those who deem tasawwaf is the soul of Islam! and the prime source of knowledge
Second and major controversial issue is about "Asool e tafseer". Ghamdi has his own set of Asool. This topic is not new but at the core of Islamic interpretation and basic to islamic laws (fiqa). I wont go into that but you may read him and the history and criticisms on asool to see his positions. Of course, Ghamdi pretend to base his asool and understanding of quran on Amin Islahi . (whose Tadabbar e Quran is probably the most important tafseer in the recent times and I have all respect for Amin Islahi , though I have not read his all seven volumes). About all progressive opinions given by Ghamdi can be taken from Islahi as well but Ghamdi goes far and above Islaahi regarding role of Hadees. Such an attempt, in practice, means that he'd interpret quran only for pre-decided conclusions. Then Quranic text becomes a playground.
It is old ploy to entice (especially younger) audiences on the name of rationalism and progressiveness but religions are not rational but a belief system based on revelations. (You may read old works of Ghizaali and Sirhindi to see the controversy). Further theology is not easy and obvious, or fully comprehensible to be subjected to rationalist's thought. Recently such enticement on the name of rationalism was seen by Perwaziat - Once one goes beyond the agreed upon asools and is bound only by the text and words - then one can pick and choose or even redefine the meanings of the words of quran of one's choice - pervaiz was often guilty of this practice.