Except there are literal UCMJ rules against being political in the militray.
For both sides.
One cant go "FUCK CAPITALISM! LETS GO FULL COMMIE!" Without getting his hard by UCMJ...And investigation by CI and more.
You cant be POLTICAL AT ALL!
From the DoD policy on politics:
A1. DoD has a longstanding policy of encourage military personnel to carry out the obligations of citizenship. However, AD members will not engage in partisan political activities and all military personnel will avoid the inference that their political activities imply or appear to imply DoD sponsorship, approval or endorsement of a political candidate, campaign or cause
A5. DoD has a longstanding policy of encouraging military personnel to carry out the obligations of citizenship, and certain political activities are permitted, such as voting and making a personal monetary donation. However, active duty members will not engage in partisan political activities, and all military personnel will avoid the inference that their political activities imply or appear to imply DoD sponsorship, approval or endorsement of a political candidate, campaign or cause. Examples of political activities that are prohibited include campaigning for a candidate, soliciting contributions, marching in a partisan parade and wearing the uniform to a partisan event. For a complete list of permissible and prohibited activities, please consult 2 DoD Directive 1344.10, Political Activities by Members of the Armed Forces Guidance for Military Personnel.
From the FAQ as it is part of a much larger document, as mentioned above...
The point is.
He is breaking rules.