The flip side of the Broken Window fallacy is the support window makers have for rioters. It is true that a broken window does not support society as a whole, because it directs resources from more productive uses.
HOWEVER, by redirecting those resources TO window makers, they become wealthy. Such people, if lacking scruple, could be expected to support ardently public unrest, anger, violence, and vandalism, even if they only do so by supporting BOTH sides, and doing what they can to build tension between them.
This, in a nutshell, is the arms industry, and those around it, like Halliburton, which may actually be guilty of the charges made of it by the Left.
The Left lies compulsively, but that does not mean it is impossible that they are sometimes, accidentally, right on the money.