The resulting cloud of debris will be in the same decaying orbit as the original satellite. (Less a few bits and pieces that might get enough kinetic energy to move into a higher orbit.) The mess will burn up in the atmosphere. The Chinese blew up a satellite that was in a higher, more stable orbit. Their debris is also in that higher, more stable orbit.
...they don’t want the sensor package to survive re-entry, and end up on e-bay, or worse, end up in the hands of the democrats....