We have the 1st amendment because of the 2nd

I know, I know, the second amendment has nothing to do in keeping a standing military, but bear with me here. They are called the armed forces. They do bear arms. My reasoning is probably weaker than wet toilet paper. Tell me where I'm wrong and I'll eat crow. For someone in the military to suggest that protest is low level terrorism is disconcerting. I hope this is only some well intentioned but misinformed individual who though they were doing right.