Bill, the scenario doesn't work simply because peacekeepers won't be sent until after Israel has agreed to withdraw and the Israelis aren't likely to get frisky over soil they are already leaving.
Grimm,
Israel may have agreed to wirthdraw, but they hadn't yet done so and wouldn't complete their withdrawal for over four months. This is the bit from Wiki about the activities of the United Nations Emergencey Force which was specifically created for peacekeeping the Suez Crisis. (Granted it's Wiki but it does jibe with what I remember reading from other sources.)
The mission was directed to accomplish its mission in four phases:
- In November and December of 1956, the force facilitated the orderly transition in the Suez Canal area when British and French forces left.
- From December of 1956 to March of 1957, the force facilitated the separation of Israeli and Egyptian forces and the Israeli evacuation from all areas captured during the war, except Gaza and Sharm-el-Sheik.
- In March of 1957, the force facilitated the departure of Israeli forces from Gaza and Sharm-el-Sheik.
- Deployment along the borders for purposes of observation. This phase ended in May of 1967.
It seems the OTL peacekeepers over a period of
four months first
separated Israeli and Egyptian forces in the Sinai, then assisted with the
withdrawal of Israeli forces from nearly all of the Sinai, and then finally helped Israeli forces
evacuate the two remaining parts of the Sinai they still held.
Four months is plenty of time for an Israeli force to get 'frisky' with US troops in an ATL peacekeeping mission. How about Israelis chasing Gaza feyhadeen while the evacuation there was on hold and bumping into US troops instead?
As I wrote initially, an actual war would be tough to pull off. A shooting incident that escalates for a day or two - especially in the 1950s before sat-comms put the President at the shoulder of every US commander down to 2nd Lt. - might be easier to manage.
Bill