It is military down there, already.

The military opening fire in us citizens on us land is treasonous, and a complete violation of their oath

"I, _____, do solemnly swear (or affirm) that I will support and defend the Constitution of the United States against all enemies, foreign and domestic; that I will bear true faith and allegiance to the same; and that I will obey the orders of the President of the United States and the orders of the officers appointed over me, according to regulations and the Uniform Code of Military Justice.

Bet the orders of the President according to the regulations

The Posse Comitatus Act, however, does not prevent state National Guard units from assisting law enforcement within their home state or an adjacent state when requested by the state’s governor, or when placed under federal control through the presidential invocation of the Insurrection Act of 1807.

The NG is helping local Texas law enforcement. No violation here.

Under the Posse Comitatus Act as reflected in Department of Defense (DoD) policy, regular military forces, while deployed on U.S. soil, are prohibited from performing several traditional law enforcement activities other than in a support role, including:

Carrying out actual apprehensions, searches, questioning, and arrests

Using force or physical violence

Brandishing or using weapons except in self-defense, in defense of other military personnel, or defense of non-military persons, including civilian law enforcement personnel

Military can't be the arm that enforces personal policy.