How long do they spend on it, and how intense is it? I really have no idea; it seems that the Israelis do an intensive crash course in interrogation.
Yeah, to get an Israel-style system working here we'd also need a hell of a PR campaign to remove the stigma of being a TSA employee.
It's not nearly as much, but better than nothing. In my position it's significantly more indepth and comes from a variety of souces, both internal and external. Unfortunately it would be extremly costly to implement to such a huge workforce. That's one way the Israelis have it easier.
Sadly, TSA is usually their own bad PR. It doesn't help that the travelling public expects a set routine that rarely if ever changes, when it's TSA's intent to introduce an unpredictable element to security that the bad guys can't prepare for.