Well then you would be wrong. I would however point out the highly interesting question of how can one do a trustworthy poll in Russia or Russian controlled Crimea considering the deeply interested attitude of Russian state and secret police towards pollsters and the people they interview.
And yes, your very source link points at an effect of Russian propaganda too, see the TV channel section.
And even if the sentiment in Crimea is totally genuine and not forced or faked, that still in no way would justify the landgrab Russia did, lest it wants US Marines to land in one of its minority regions (for biggest lulz, ask the parts of Siberia with oil if they would want to be Americans) and do a poll about sovereignty there, it's just simply a kind of action that is generally not considered acceptable among all countries of the world, that is if it was aimed at them at least.