You've literally laid out the definition of an ad hominem attack. As long as what they are "leaking" is true I don't care what there motives are. Put it this way, the best way for the american government to fight against this "agitprop" organization is to stop doing illegal and shady shyt. How about we focus on the government doing that?
Obviously a foreign government is going to gain by making us look shady, again I'll say, the best way to fight this is....STOP DOING SHADY shyt.
Your argument amounts to this...
As a drug dealer i get upset when other drug dealers snitch on me because they too are dealing drugs. IT's unfair and we shouldn't really be focusing on the fact that I deal drugs, we should be focusing on how these other drug dealers are not snitching on themselves...