The tomb of the rabbi that was spray-painted with a swastika is in Dnepropetrovsk, which is in the Russian-speaking part of the country that is still under Ukrainian control (barely).
Dnepropetrovsk has seen violent neo-Nazi activity in the past few months, mostly against the Russians there. But the Jews are not safe. In 1941, somewhere around 11,000 Jews of Dnepropetrovsk and neighboring villages were rounded up by the Nazis and taken away to be shot, while their Ukrainian neighbors watched.
Today, a merry-go-round stands on the spot where the Jews were rounded up.
And a swastika is painted on a rabbi's grave.
But, yes, maybe the spray-painters and the people attacking the Russian speakers were Russians pretending to be Ukrainians to make Ukrainians look bad.
Eastern Ukraine is a very complicated area for Americans to comprehend. They have a different sense of good guys and bad guys there than we do, more nuanced, perplexing and contradictory.