The US and Israel have a love/hate relationship. Most of the time the US helps Israel... because the Israelis are in the right. Sometimes the US helps Egypt or Jordan... When Israel is not so much in the right.
For each year of 1976-2002, Israel was the largest recipient of U.S. military aid. Egypt was second-largest 1981-2002. In 2010 Israel received $2.7 billion in US military aid. Egypt got $1.3 billion and Jordan $303 million.
Egypt has more than a thousand shiny newly-upgraded M1A2 Abrams tanks. The second largest fleet of M1 tanks anywhere... second only to the US of A herself.