For about three years I’ve been reading the posts on an expat site based in Ukraine for mostly Westerners either living in Ukraine or looking into moving there. The members live all over Ukraine including the eastern part and the Crimea. None of the reported events you have accepted as fact were seen by people or the members of their families living there.
Check the older posts out for yourself.
These events were recorded as they happened. There are photos, videos, interviews and on-site reporting. With that much empirical evidence available, who cares what someone else claims they didn't see?