A sample size of 1200 is not representative of anything more than random phone calls to people who just moved to Crimea from Russia.
Then show me what is representative. Until then, this stands.
Besides, if voters were threatened to vote YES, out of 275,000 who did vote, Western "democracies" would love to have at least a dozen at hearings in Congress or some other international body. If you know of any such testimonies, please let us know.
You need to prove it's valid for your charge to carry any weight.
That's not how it works in life and in law. The accuser has the burden of proof. You and others here are the accusers. You accuse Russia of conducting a flawed and, therefore, invalid referendum. You have the burden of proof, Duh!
The Republicans claimed that the last elections were stolen. They failed to prove it. The other side didn't have to do anything. Duh, again.