Washington Post columnist Charles Krauthammer argues that whether or not Israel fired an errant shell is irrelevant:
Okay. Let’s concede for the sake of argument that the question of whether it was an errant Israeli shell remains unresolved. But the obvious question not being asked is this: Who is to blame if Palestinians are setting up rocket launchers to attack Israel — and placing them 400 yards from a beach crowded with Palestinian families on the Muslim Sabbath?
Answer: This is another example of the Palestinians’ classic and cowardly human-shield tactic — attacking innocent Israeli civilians while hiding behind innocent Palestinian civilians. For Palestinian terrorists — and the Palestinian governments (both Fatah and Hamas) that allow them to operate unmolested — it’s a win-win: If their rockets aimed into Israeli towns kill innocent Jews, no one abroad notices and it’s another success in the terrorist war against Israel. And if Israel’s preventive and deterrent attacks on those rocket bases inadvertently kill Palestinian civilians, the iconic “Israeli massacre” picture makes the front page of the New York Times, and the Palestinians win the propaganda war.