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"Israel Shows What Alliances Are For"

Absolutely spot on.

Never mind that the $3 billion in military aid amounts to a Pentagon subsidy for American arms manufacturers. Never mind also that Israeli military technology and intelligence make an enormous (and largely untold) contribution to American security.

There's a reason to maintain alliances in the cold light of Realpolitik which conservative isolationists refuse to consider: Allies can do things that we want done at much less risk to us and at far lower cost than if we were to do them directly.