The US has every reason to search ESPECIALLY Israeli vehicles and persons crossing the border. The case of two Israelis caught in Washington State comes to mind. They were caught with explosives residue in their van. Kind of suspicious, no? I know, it's not like they were in possession of something imminently dangerous such as a laptop, right? You're an idiot.
Police disperse hundreds in brawl in Kafr Manda, northern Israel (Haaretz)
from the article: Police shoot U.S. student's laptop upon entry to Israel