When does warring stop and turn to suiciding?

If a small nation like NH wanted to war USA, would that be classed as suiciding? If our only reason for doing so was because they don't like you or how you do things? All they would be capable of doing was either killing a few small states or really hurting a big state, possibly killing it. And then they would be wiped out like a bug, and brandished with the title of suiciders.

But if LoL declared war on USA, people would view it as a war, where does the line blur and change to suiciding?