Why can't the U.S. be more like Israel? Oh, I don't know, maybe because we're a democracy and take civil liberties seriously and Israel winks and nods at the notion. Maybe because we know enough about racial and ethnic profiling to reject the notion especially when you establish it at the core of a nation's airline screening process. Maybe because we have a more balanced, nuanced understanding of the conflicting requirements of national security and individual liberty.
This article is referenced and worth reading too: On airport security, do we really want to be like Israel? By Joel Dreyfuss