This is obviously a False Flag, engineered precisely to get American Jews up in arms and taking a side as obiwan is doing. Modern governments (particularly the descendants of the statistics-obsessed Soviet Union) already force all their subjects to register themselves, including their religion, income, property, etc. All of this information is already in the hands of the government, there's no need to try and re-collect any of it. But the PR value of the symbolism of this story is worth millions to those trying to get America to intervene.
The story itself seems to support this:
"The leaflets bore the name of Denis Pushilin, who identified himself as chairman of "Donetsk's temporary government," and were distributed near the Donetsk synagogue and other areas, according to the reports.
Pushilin acknowledged that flyers were distributed under his organization's name in Donetsk, but denied any connection to them, Ynet reported in Hebrew."