Edit: you've been posting a lot of unsubstantive, inflammatory comments about political topics. That's not what this site is for, so please stop.
Let's not get on a high horse about rhetoric in the comments?
Absurdum is right.
They probably spent a lot of time on the message. Coded words or phrases. Embedded keys. Resistance to identification analysis.
Its some 4chan racist idiot's idea of a red herring.
Its a racist idiot's idea of a joke.
Here's an example of an open-source project designed to counter stylometric analysis: https://github.com/psal/anonymouth
With how much caution they are taking against a nation-state adversary, I think it a bit short-sighted to think that this is just "a racist idiot's idea of a joke".