From my experiences on Twitter with various anonymous accounts parroting the state department line, and US military doctrine for total domination of the battle space, I am absolutely sure they are doing this either via a contractor, ally, or inside cyber command or DIA etc. The 2012 NDAA removed the ban on US domestic influence operations.
https://www.businessinsider.com/ndaa-legalizes-propaganda-20...
https://foreignpolicy.com/2013/07/14/u-s-repeals-propaganda-...
You gotta remember. These guys used to do COINTELPRO (and never documented stopping it either). You think they won't troll people on the internet?