This seems like attempting to weasel-word. If Ghandi said "We have a lot of guns, and looting leads to shooting", it's a lot more clear that the meaning is (2). Trumps tweet didn't just say that one sentence, it said, in order:

* "the Military is with [the governor]"

* "any difficulty and we will assume control"

* "when the looting starts, the shooting starts"

There's a clear causal relationship between these three statements, this is not a plea for peace, it is a threat of violence.