Russia must apologize, not Ukraine!

Russia wants Ukraine to apologize and expect explanations from it after the attack on a checkpoint. I'm not sure if this attack was not even made by Russia to reason that the Russian army had to intervene in Ukraine. But I think Russia should apologize, not Ukraine. Russia occupied Crimea. That referendum was a fake. Russia supports separatist armies. Ukraine defend their territory. Russia Yanukovych claimed him. She did everything to rid Ukraine of control.