This sounds good BUT what do you do about the Muzzies who fly their planes into our buildings?
We defend ourselves. We have a much better chance at that if we focus our efforts to our own shores. We must look at history to see what can happen if we over-extend.
Many accounts have America and the World near economic collapse. A weakened America would make an easy target for adversaries.
Please do not assume that isolationism equals weakness. In my opinion, given the state of things, it equals prudence.