....you brainwashed liberal dupes!
...the best way to end an insurgency is, quite simply, to beat it.
Why was this not obvious before? When military strategies fail – as they did in Vietnam while the U.S. pursued the tactics of attrition, or in Iraq prior to the surge – the idea that there can be no military solution has a way of taking hold with civilians and generals eager to deflect blame. This is how we arrived at the notion that "political reconciliation" is a precondition of military success, not a result of it.
There's also a tendency to misjudge the aims and ambitions of the insurgents: To think they can be mollified via one political concession or another. Former Colombian president Andres Pastrana sought to appease the FARC by ceding to them a territory the size of Switzerland. The predictable result was to embolden the guerrillas, who were adept at sensing and exploiting weakness.
The deeper problem here is the belief that the best way to deal with insurgents is to address the "root causes" of the grievance that purportedly prompted them to take up arms. But what most of these insurgencies seek isn't social or moral redress: It's absolute power. Like other "liberation movements" (the PLO comes to mind), the Tigers are notorious for killing other Tamils seen as less than hard line in their views of the conflict. The failure to defeat these insurgencies thus becomes the primary obstacle to achieving a reasonable political settlement acceptable to both sides.
This isn't to say that political strategies shouldn't be pursued in tandem with military ones. Gen. David Petraeus was shrewd to exploit the growing enmity between al Qaeda and their Sunni hosts by offering former insurgents a place in the country's security forces as "Sons of Iraq." (The liberal use of "emergency funds," aka political bribes, also helped.) Colombian President Álvaro Uribe has more than just extended amnesty for "demobilized" guerrillas; he's also given them jobs in the army.
But these political approaches only work when the intended beneficiaries can be reasonably confident that they are joining the winning side. Nobody was abandoning the FARC when Mr. Pastrana lay prostrate before it. It was only after Mr. Uribe turned the guerrilla lifestyle into a day-and-night nightmare that the movement's luster finally started to fade.