Sorry to say I dont agree. Sindhi Nationalist still strong hold in Hyderabad did you hear any issue except in 1970s and 1988 planned by establishment.
You used the work Hindutva and Zoinist, please read more about the nature of Sindhs. No ever other different ethnicity (Urdu, punjabis, pathan...
Sindhi and Urdu speaking are living togather since independence. If any body have doubt please go and see in Sukker and Hyderabad where Urdu speaking are living without any dispute and conflict. PPP , MQM, Establishment and Afghani pathans had been worst and effecting the city dynamics...