Squashing an ideology with military force is a waste of time. occupying land and killing civilians = entices terrorists and encourages enrollment. Again no benefit.
It's funny you have in your signature "Are you a sheep". Read Grossman's "On Combat" and then ask yourself that same question.
How would you know? How much firsthand knowledge of what goes on in Iraq or Afghansitan on a daily basis do you possess? How much of your time have you invested in counter-insurgency operations?
that is your opinion. many, including me, disagree with you. you asked for a benefit, and imo,squashing those that are intent on killing us is a benefit.
Because our own CIA has published reports on Blowback. Hell even DC said Iraq was a quagmire back in 94 YouTube - Cheney: Iraq invasion "a Quagmire" But I bet you know more than both of them right?