There is no need to get angry. The purpose of these questions is to determine exactly what you are demanding. I am not condemning nor condoning your view point for the time being. First of all we must understand what you are actually asking.
So you are demanding a sharia system based on more or less American democratic system. This system has no example in the history and therefore must me invented. Or you may be demanding a western democratic system and call it sharia system for namesake. Your argument that the concept of Khalifa is closest to American democratic system is far from reality. Although Khulfa e Rashideen were nominated after some sort of collective consultation, but this consultation was amongst a few pious men only. Women, minorities, and common population had not been a part of that consultation process. While American democratic system is based on one man one vote, irrespective of gender, religion, faith, intelligence, piety etc. May be you should consider communist party system adopted by communist Russia being closer to Islamic sharia system as only members of communist party who were certified members of a certain philosophy could become part of the consultation process.
If you think American democratic system is the closest to Islamic system, please give one single example from the history.
My specific question was “what exactly Mullah Omar govt. was doing against sharia as explained in Quran and Sunnah. Afghani taliban were highly educated in Quran and Sunnah from some of the renowned religious leadrs of our times.” Here you failed to answer my question specifically and accused them of selectively adopting sharia from Quran. Now I will put a supplementary question to you and hope you will care to answer my original question also.
Who will determine in a sharia system if the Khalifa is acting according to sharia?
The system of Holy Prophet PBUH cannot be adopted today as he had the luxury of divine guidance whenever required which is certainly not available today.
The system of Khulfa e Rashideen could also not be adopted after the demise of the immediate companions of the Holy Prophet PBUH as that calibre of human resource was simply not available.
Afghani Taliban with all sincerity wanted to adopt sharia system and choose a Khalifa Mullah Omar, and I have no doubt on their intentions. Now you say their Khalifa was not sharia compliant. Under these circumstances who is going to determine if the Khalifa is sharia compliant or not?
These are typical blackmail tactics when so called religious scholars who cannot explain anything logically they start accusing people of denying Quran, Sunnah, and Holy Prophet PBUH. What I understand from these sources can be different from your understanding.
There is no unity of leadership in the Islamic world and I am sure you cannot deny this fact. Under these circusmstances who will determine which understanding is correct?
You have to answer these specific questions to understand your stance better. Right now your post is full of contradictions and confusions.