Who said muslim get offended if terrorists are "abused"? These groups are influenced by extremist terrorist isis-like ideologies which is alien to the sufi Islam of south-east Asia. Muslims, specially in middle east, killed many ISIS terrorists.
Randomly beating up or threatening fellow Indians citizens because of their muslim faith by hindu fanatics is ugly, backward, savage behaviour which should be condemned.
We have an arab minority in Iran. During Iran-Iraq war all arab countries backed saddam who attacked our civilians and soldiers with chemical weapons on a massive scale! they even occupied parts of southern Iran which got liberated later. Would you expect Iranians to randomly kill and threaten fellow Arab citizens? I'm glad we didnt have this fascist mindset.