Who's calling the shots in Gaza? If the Israel campaign is motivated by freeing the hostages...why give them a reason to go to war? release the hostage and be done with it. But Hamas won't release the hostages...they'd rather see the Palestinians suffer...Inkspot strategy - Wikipedia
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War is never "clean", but carpet bombing churches is a lot worse than this.
Israel wants Gaza's territory. They're just choosing explosive demolition and foregoing the eviction process.