Comment: Who says it's

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In reply to comment: It is simply false to claim (see in situ)

Who says it's

a fib? He might really believe an attack on Israel is an attack on U.S. interests.

He might also believe an attack on Mexico or Canada is treated as an attack on the U.S. because of their proximity and the economic trade we have. This doesn't mean he would go to war as if the U.S. was attacked. It only means U.S. interests are harmed.