Here's the point to ponder:
Pakistan blocked the NATO supplies in November 2010.
In spite of heavy diplomatic efforts, the supplies were stalled for over 10 days...
Then followed the tumultuous months full of intensified drone strikes, Raymond Davis fiasco, OBL operation, Copter intrusions, even more intensified terrorist attacks...
Now that they are blocking the NATO supplies again... interesting times ahead!
Not sure if the blocking of supplies has anything to do with the incidents you mentioned, unless you yourself believe in conspiracy theories.