If Pakistan had supplied them with intelligence, weapons and resources, then there would be a case for "state sponsored terrorist acts" having been
carried out.
How many US military staff have gone on to commit a crime? Because they were trained in something by the military does not mean the military colluded
or supported their future actions.
This means nothing. And if India try to use this as "evidence" that Pakistan (leadership) were involved in this attack, I sincerely hope allies of
India point out their error.
But I guess it will all depend on what other nations will get out of a conflict between India and Pakistan. If the US or UK will benefit from such a
conflict, they'll agree that this is clear evidence of a Pakistan Military involvement.