I agree with everything u said but please make a correction Ahmedis are non-muslims (they must be provided protection just as christians and other minorities should be). similarly ahmedi places of worship are called 'jamat khanas' (i think) and never called Mosques or Masjids.
I am not declaring Ahmedis non-muslims, go and read the constitution of Pakistan . When it was drafted there was/is general consensus among all the schools of thought (Bralevi,Deobandi,Shia,Sufi) of Islam that Ahmedis are non-muslims. And Islamic scholers who headed the committees were very highly qualified and many of them knew more then 4 languages and KNEW well why the official declaration was made and why it was necessary . Having been declared non-muslim in the constitution they are nevertheless citizens of Pakistan with their own identity 'Ahmedi' .
What you believe personally is fine but when you want to label a group through constitutional amendments, it speaks volumes of your own weakness in faith and how as a majority you want to suppress a smaller group. This then allows you to work in this manner moving onto other target.
The anti Ahmadi agitations were started by Islamic groups to gain a foothold in Pakistan, there issue with them was that they reject Jihad. The government did not meet their demands and violence erupted because they did not have their way. They later did the same but used the finality of Prophet as a main cause of friction, this time violence was seen from the get go and they got their way.
Now you see similar tactics being used by terrorists because their demands are not being met. The thing with the Ahmadi status opened doors for others to try and do the same with different sects. Until and unless this does not change, expect extremists to use similar methods.
As for the committee and the hearings, the Pakistani government have not released those recordings of what occurred in 1974. The ulema had their mind made up already and they were not pious people as you claim but rather politically motivated leaders who wanted to oust a powerful group. Read what people present at the hearings said about why the recordings were not made public.
Maulana Kausar Niazi who was involved in the 1953 agitation had asked Bhutto not to declare them as Non Mulims as it was irrelevant but Bhutto went ahead and sectarianism reached new heights in Pakistan.
The Ahmadi issue was political, they helped Bhutto win Punjab and had a lot of influence in Pakistan through their military and civil connections. The other Islamic groups got them out so they can replace them. One of Bhutto's biography mentions that Ahmadi's had become king makers and he did not want to loose power so he appeased the other groups by excommunicating Ahmadi's.
P.S Agha Khanis call their places of worship 'Jamaat Khana', not Ahmadi's. I live close to their main one in Clifton, Karachi.