Pretty sure this isn't the first time an American citizen has been involved in terrorist activity in Israel, I don't think the US ever got involved, if you go to a dangerous place the US isn't responsible for you anymore.
Jewish apologists are the worst!! The US has diplomatic ties with the Palastinian Authority..unlike say norh korea, iran, cuba.. if you pst taxes in the USA your funding the PA..
from travel.state.gov
The Department of State urges U.S. citizens to exercise caution when traveling to the West Bank. Demonstrations and violent incidents can occur without warning, and vehicles are regularly targeted by rocks, Molotov cocktails, and gunfire on West Bank roads. U.S citizens have been killed in such attacks. There have also been an increasing number of violent incidents involving Israeli settlers and Palestinian villagers in the corridor stretching from Ramallah to Nablus, including attacks by Israeli settlers on Palestinian villages in which U.S. citizens have suffered injury or property damage, and attacks by Palestinians on settlements. U.S. citizens can be caught in the middle of potentially dangerous situations, and some U.S. citizens involved in political demonstrations in the West Bank have sustained serious injuries. The Department of State recommends that U.S. citizens, for their own safety, avoid all demonstrations. During periods of unrest, the Israeli Government may restrict access to the West Bank, and some areas may be placed under curfew. All persons in areas under curfew should remain indoors to avoid arrest or injury. Security conditions in the West Bank may hinder the ability of consular staff to offer timely assistance to U.S. citizens.