Self-detonating houses

Brian Ledbetter of Snapped Shot raises an interesting question about the vitriol heaped on Israel for detstroying houses used to attack it  - as during the past summer's war with Hezb'allah. On Saturday, Hamas attacked a house used by a rival Fatah official. No Israelis to blame this time, so the press hasn't really been interested in making any big noise, of course.

But what captures Brian's attention is the devastation, which strongly resembles the sort of wreckage used to berate Israel as a bunch of brutes. He provides pictures.

It turns out there was an arms cache in the official's house. Nevermind what this reveals about the responsibility of Fatah. Consider that such caches are likely to have been present elsewhere, and may be at the root of destruction attributed to Israel. How many houses allegedly destroyed by the IDF might have self-ignited?
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