These things may be IED resistant....but nothing is EFP resistant....Just ask any of the boys in the sandbox.
+1 on this. If untrained, ill-equiped middle easterners can cause us so much trouble in theater imagine what well trained, well equiped US civilians could do on their home turf.
A war here on US soil would prove difficult. Access to technology, knowledge of the area, many armed and some trained and willing to pass on the knowledge. It's just not logical to wage an all out war. It's that eating an elephant 1 bite at a time scenario.