The reciever was culpable as well, hits your hands should be caught, but Sanchez is equally culpable for his usual horrific accuracy.
Like many things, it's not either or. It's both. Sanchez's bad pass to a reciever whose iffy hands were not up to catching that bad pass.
I could take you out into the parking lot old friend, and throw you ball after ball after ball you could never catch, but that would hit your fingertips. High and behind, a Sanchez staple, is very very hard to catch.
Doesn't excuse the reciever, this is the NFL. But just cause a reciever gets a finger on the ball does not excuse a bad pass either.