Just more performance art by a professional contrarian. The military don't need reminding of anything from those six slobs. Those six could not cut one day in the military. It is not up to every person in the military to question every order sent them; for one thing, they are not remotely qualified. Constitutional EXPERTS argue over the meaning of this or that before the Supreme Court, so HOW THE HELL is a lieutenant or corporal or even a Major or Colonel expected to determine the constitutional "legality" of an order?
It is the job of command to do that. When an order comes down from the POTUS or from a general, etc., if there is any question of legality, it is determined then by special attorneys for the military, not even by command per se. Once an order hits the troops, it is their duty to merely obey.
It would have to be blatantly crazy insanely wrong for a soldier to question an order and refuse to carry it out. Ironically, these six idiots in congress are actually plainly guilty of committing the very thing the Left have only tried to accuse Trump of doing on J6, so, if they can justify these six's actions, then they can no longer attack Trump for sending his rally crowd to the Capitol in support of Pence.
If there is any actual legal question in a command, it is usually determined and resolved later. It is the absolute epitome of ignorance to suppose that every soldier in the field can and must review the constitutionality of every order before carrying it out. Aside from assuming any soldier even HAS that skill, knowledge and authority, no military can operate on the basis where every order is questioned first before being carried out.