Haven't read it fully yet, but this long LRB essay on the pro-Israel lobby in the US is worth taking a look at. Here's how it starts:
For the past several decades, and especially since the Six-Day War in 1967, the centerpiece of US Middle Eastern policy has been its relationship with Israel. The combination of unwavering support for Israel and the related effort to spread ‘democracy’ throughout the region has inflamed Arab and Islamic opinion and jeopardised not only US security but that of much of the rest of the world. This situation has no equal in American political history. Why has the US been willing to set aside its own security and that of many of its allies in order to advance the interests of another state? One might assume that the bond between the two countries was based on shared strategic interests or compelling moral imperatives, but neither explanation can account for the remarkable level of material and diplomatic support that the US provides.There's an even longer version here.