But performing law enforcement duties at the state or local level is not. Not unless Congress specifically authorizes it.
You may not remember the military attack on Pastor Koresh and his congregation in Waco. You can google it. Nobody was prosecuted for that.
I remember it. That was a BATF operation.
Ann Richards provided National Guard troops and equipment to the FBI who took charge after the BATF screwed up. Those were citizens whose only crime was MAYBE they didn’t pay the tax on a couple of their guns.
On our southern border we have a hostile military that repeatedly comes into our country and assaults our citizens.
We also have terrorists crossing that border. We supposedly have a war on terror.
What we do not have, and haven’t had, is a president who will defend our nation from foreign invaders. We also have a pro-criminal axis who side with the criminals and the invaders.