I hosted a Ukrainian model and her BF for a week about a month ago, and we talked extensively about this... and yes indeed, Kiev does (according to them) shell it's own people now and then in order to get aid (money and weapons) from the US. The current president of Ukraine is a horrible wicked guy.
Obama didn't give any weapons to Ukraine and he gave very little of anything else. No offense, but your Ukrainian model friend sounds brainwashed.