I think there's a difference in scale Lonnie.
The US gives Israel $3 billon a year in military aid, and has been funding it's military in the billions for over 20 years.
http://en.wikipedia.org/wiki/Israel-United_Sta tes_military_relations
US intelligence reckons Hammas to receive about $50 Million from various sources.
Israel has also developed nuclear weapons yet far from receiving pressure to disarm and sign the non-proliferation treaty is being funded!
Not only that but Israel develops Chemical and Biological weapons at Ness Ziona.
Israel is also believed to have used forms of nuclear weapons against Palestinian targets and is currently accused of using chemical weapons such as white phosphorus in areas of high civillian concentration.
It is the US's continued political and financial backing of Israel that gives it the ability to continue to hold out against demands for it to talk to Hammas.
Until Israel does talk to Hammas there will be no prospect of peace and more and more civillians will die on both sides.
Personally I think the US needs to engage with Iran and Syria and Saudi Arabia and agree an embargo of military funding on both sides in order to force both to negotiate a settlement.
But whilst the US was going around banging drums and shouting "Axis of Evil" that was never going to happen.
Maybe it can now