I do not think we in India has problem with Ahamadiyat or heard/read much in any other country of any serious alarming issue due to their differing views - except in Pakistan. It may be deviant group like many others Muslim or Non-Muslim group or ethencity. Even some so called Muslim Bohras in India says " we are not Muslim but Bohras or Momin". Still we in Mumbai stay with them in the same neighbourhood as they, ignoring their perspective. We believe our faith in Oneness of Allah should not be affected as long as we strongly believe in Quranic guidelines. It is the Mullas/Scholars from each group conjecture and ignorant followers carry on their belief to create seperate identity for pecuniary purpose and ego. No doubt, the same Mullas/Scholars/Masterminds will be double-cursed by the very followers on judgement day (33:68) . What is purpose of targetting Ahmadiyyat, even they may be worst in their faith as per our understanding. Even Mushrik will be judged on Judgement day 22:17 as we have no reason to be contempteous of their scriptural comprehension.
Like all other deviant group within Muslims, they too are the one extremist deviant to claim others Muslim as Non-Muslim. Even interpretation based on Quran too is condemned as divergent!!!!!
It is Allah to judge between us and them in the hereinafter. Afterall there is no compulsion in religion (2:256) as all will be returned to Allah for judgement.