> It makes as much sense as caving to any other form of terrorism.

Addressing the systemic reasons behind hostile actors does not mean "caving" to the actors themselves.

Should we let ISIS take over the Middle East and establish a fascist theocratic state? No, obviously not.

But that doesn't mean we shouldn't carefully consider how the past decades of violent imperialist foreign policy might have played a significant part in the conditions that allowed ISIS to rise, and use that to inform our future policy.