Earlier quoted context omitted.
The U.S.'s historical strategy has been to find or create some credible faction wherever it wanted to meddle and then support it using any means necessary, ethical or otherwise, and coerce other countries to go along with it. In purely internal matters such as against the Native American populations it sometimes bothered with some fig leaf legal cover but other times it would just take what it wanted in the most brut…
Even if you accept that votes can be taken by anybody and whenever, yes, you need international observer. Otherwise the vote will go the direction of whoever can coerce the locals the hardest. That's not democracy, that's not "the will of the people", that's a sham.
85% agreed with the result.
Russia didnt run that poll. We did. No troops were standing behind the answerers. It agreed entirely with the result of the referendum.
If we hypothesize coercion or fraud in crimea the poll would have disagreed with the results. It didnt.
Coming up with ever thinner pretexts for rejecting the result of this referendum is simply a rejection of democracy - that thing we are supposed to be fighting for.