The threats worked up until current Big Boss decided to tariff everyone anyway, on Liberation Day.
Not only is there now no incentive for other countries to follow suite - there is now strong incentive for other countries to distance themselves from US trade. Recent history has made that abundantly clear.
You'd have major protests in most large economies if they deliberately put themselves under the boot again. Even in "friendly" countries the US is disliked enough to be effectively considered a hostile country. E.g. in Germany, there is large public support to finally get the US bases closed and the soldiers removed.
Lots of things changed in the last years. And international major treaties being widely ratified just because the US asks for it is no longer a thing, at all.
A country that threatens to annex parts of your territory is not a friend, full stop.
Although I imagine you have a point: American police do perhaps act this way.