Any gun can blow up, with any brand of ammo. It's entirely unlikely that factory ammo would do such a thing, but even the best of manufacturers can put out a bad round here and there.
Regarding the ammo, they claim that it was a popular brand of commercial reload, so the unfortunate fellow's gun should be covered by their insurance. The guy was using unjacketed lead reloads, in the factory Glock barrel (polygonal rifling). Not a good combination, unless you really know what you're doing.
The key here is, that you CAN use lead in a Glock barrel, but you'd better be damn sure that the alloy is hard enough, or else that polygonal rifling will tear into that bullet, resulting in leading.
At the same time, you have to be sure that the alloy isn't too hard, or else the bullet will not seal the bore properly, resulting in hot gas eroding the lead bullet, and even more leading.
There were a few times I've used lead reloads in my factory Glock barrel, but I only did this with Oregon Trail's excellent Lasercast bullets (no leading guarantee), kept the pressures low, and would toss out any brass that had the 6 o'clock bulge.