As seen by night vision equipment being recovered from terrorists, Pakistan cannot be trusted with U.S. equipment. It is impossible to know how the equipment will be handled or who it will be given to. Giving specialized equipment to Pakistan is essentially giving specialized equipment to the enemy. Because the U.S. cannot control what happens once the equipment is sent to Pakistan, it should not be given to them.
Pakistan should not receive any help from the United States, because they are not an ally of the United States. The country harbored Osama Bin Laden for years, when even Jon Stewart made jokes that the Pakistani president knew where he was. Pakistan has nukes, they constantly threaten India, and they cannot be trusted.
Yes, the United States should stop supplying Pakistan with military equipment. It is clear that the situation in Pakistan is such that diplomatic intervention and increased positive relations with the Islamic world are more likely to have a positive impact than supplying military defensive or offensive equipment to a region with violent upheaval.
No, the U.S. should not necessarily stop equipping Pakistan. Pakistan is an important ally in the fight against Middle Eastern terrorism. However, the fact that some of the equipment seems to be making its way to terrorist groups is alarming and should warrant serious investigation to find the source and stop it.