It's a simple principle. You're responsible for the predictable consequences of your own actions. In the context of US imperialism, criticizing the atrocities of an official US enemy - particularly when the US is engaged in torturing the population of that country - will be predictably used as ideological fodder in the continuing "campaign of suffering". And since the primary responsibility of anyone is for the policies of their own government anyway why would you want to join the liberal media in its hypocritical denunciations of the enemy-du-jour and risk contributing to that suffering?