Provocative is a stretch. A year ago a Danish soldier who responded to an ambiguous situation involving US bases that might be real or might be an exercise would have been court martialed and probably not able to justify their actions with this law despite it being on the books. The reminder is an emphasis that the US can be presumed to be such an invading force.
Sure. But a year ago the US didn't have a ministry of war and the head of that ministry didn't say he wants to betray and invade an ally.
Even the thought of this would have been laughed at for being to satirical a year ago.
But hey, Kamala Harris is really radical, right?