The best, maybe the only way of reducing foreign terrorist threats we face today is to address the policy issues that fuels the terrorists anger.
I think this is less likely than the absolute safety you say is impossible. (I think they both are, actually, but what I was hoping for was a way to minimize as much as possible the danger.) People are too enamored of their victimhood and will refuse to set aside the wrongs done to them.
A couple of years ago, I read Philip Roth's "Operation Shylock" which dealt with the Israeli-Palestinian conflict as of 1993. Sadly, nothing had changed even the tiniest since then. No reason for it to change even now.
