You just made that up. Everyone in Ukraine speaks Russian. People who speak only Russian and consider themselves ethnic Russian live all over Ukraine and serve in the Ukrainian Army. The separatist rebels are the ones who had elections that were farces. That is what the foreign journalist and international observers reported. The elections for the government in Kiev got a thumbs up. You are just following the propaganda of Moscow.How can a government that overthrew an elected government be considered legit?Ukraine is recognized as a legitimate government by the international community. They have a right to higher whoever they want to provide security or assist their military as paid contractors. The unrecognized governments in Crimea and eastern separatist are not recognized by anyone other than Russia as being legitimate. China would not even vote for their legitimacy at the UN. The Chechens and Russians who come to Ukraine to "volunteer" are the ones committing international crimes. If an American has been captured by an unrecognized group, he is being held by an entity with no more validity than a drug cartel or terrorist group.
Of course, in the day of this lying bunch of bastards, anything goes.
Even if you take the position that the elected Parliament did not follow the proper procedure for impeachment and the replacement of the President after he fled Ukraine and went to Russia, there have been internationally monitored elections since then and the current government is an elected government. The current government has been overwhelmingly supported by Ukrainian voters in three elections when elections for President and Parliament are counted.
It was a coup, pure and simple. Live by the sword, die by the sword. The voting was a farce anyway, only Ukrainian speakers could vote. The Russian speakers are in the East.