Who has done more damage to Islam and Muslims-erstwhile USSR or USA?
We can not answer this question at the moment.
The reason is two fold.
Firstly the damage by the US of A is still continuing and any stock taking, while a worthwhile academic exercise, will be only temporary. (No offense meant to the people who are suffering.)
Secondly we do not have an objective assessment of the damage done by the erstwhile USSR.
We have some hints about the latter in the following sources.
Travelogue of Pir Zulfiqar Ahmed Naqshbandi Sahab (DB).
Travelogue of Mufti Taqi Usmani Sahab (DB).
Here.
Here.
Here.
Courtesy : Brothers at Sunni Forum