For long India said ISI was behind terrorist activities in India. USA was quiet. For some years Afghanistan said ISI was behind terrorist activities in Afghanistan. That included Indian Embassy. USA was quiet. When American Embassy was attacked USA spoke. Americans wanted Pakistan to take action against Haqqani group, veritable arm of ISI, or they will act on their own.
WikiLeaks on 26/7/2010 made public many secret documents dealing with Afghan War. Some of them have relevance to India.
ISI played a role in terrorist activities against Indians. ISI paid the Taliban and Haqqani network to target Indians, Indian Embassy, Indian Consulate in Kandahar and other places. Indians have died. India has suffered loss of property.
It is futile to expect Pakistan to act against ISI or USA to do anything significant. India has to act on its own…