This one I'm not sure, but the NC one was done by a far-right conspiracy believer. It's also been done by some of the far-right militias that have popped up in the last decade.
They do it because they think it'll destabilize the country and start a civil war. One they want to win so they can inflict their ideology on everyone nationwide, whether it's wanted or not.
I was gonna say. I distinctly remember that the only reason cluster munitions were sent was in response to Russian ones targeting civilians.