Jews Must Register in
This sounds like a shake down scam. I hope it's just a scam. There was worry about right wing parties in Western Ukraine which have been around awhile but haven't played the all to familiar Gypsies & Jews gambits. As some of these parties have in other former Eastern block countries.
Jews in the eastern Ukrainian city of Donetsk where pro-Russian militants have taken over government buildings were told they have to "register" with the Ukrainians who are trying to make the city become part of Russia, according to Ukrainian and Israeli media.
Here is a link that might be useful: USA Today