It all sounds like some very reasonable language, and yet no other countries raised the same objection, including not only countries we are not allied with and don’t generally seem to respect, but also countries we are allied with and do generally seem to respect.
I read it as “hey guys let’s all agree to do this thing, and then we can figure out the details” and US is the singular guy in the meeting who is like “nope, we can’t agree to do it until we’ve split every hair about exactly how it will be done.”