People such as military generals, arms contractors, politicians, those with stock in the contractors and the idiots who wave the flag no matter what have a major hand in this problem. They make up the "War Party." Though a minority, they have conned the rest of us into accepting a new kind of war.
Instead of fighting wars that we could win or even battle to a draw (like the Korean War), we started getting involved in wars for the sake of fighting wars.
Of course that sounds like unwise policy, so:
The War Party has employed phony arguments like Tonkin and 9/11 and phony enemies like bin Laden.
They have factored the phrase "national
security" into public announcements of decisions but no one ever says what
They told us we had to stop the "domino effect" in Viet Nam, but even though we lost South Viet Nam, the dominos did not fall.
They told us that we had to oppose the communists who don't believe in freedom though South Vietnamese, our allies, never held free elections during the time we occupied their nation.
They told us Saddam Hussein was an ally, then they later said he was another "Hitler."
They have told us both China and Cuba are evil communists, but that it is OK to trade with China but not Cuba.