re: "If they can understand the other side..."
Crap is the idea that we could endlessly stop Islamist terror at our shores without any sort of major military action overseas.
What kind of world is this? A major miltary overseas is required to stop terror?
How? By inspiring more terrorism?
Plenty of countries have been hit by terrorism and yet, no miltary action followed...because the terrorists don't belong to a specific country, they even often are homegrown.
It is a police matter ;discretion, patience, infiltration, language knowledge are far more efficient than highly visible armed militaries.