in a moment, we'll speak with the dean and founder of the simon weisenthal center in los angeles., phil black on who might have sent the leaflets. >> reporter: the rabbi reads the text, which says, all jews over the age of 16. he tells me the notice was handed out near his synagogue on tuesday. he says when he first saw it, he felt shock and fear. america's ambassador to ukraine described his reaction to cnn's jake tapper. >> it's chilling. i was disgusted by these leaflets, especially in ukraine, a country that suffered so terribly under the nazis. it was one of the sites of the worst violence of the holocaust. to drag up this kind of rhetoric again, almost beyond belief. >> reporter: the notice is signed dennis pushilin. he is the leader of the crowd's occupying government buildings in donetsk who wants to break away from ukraine. the man denies he's behind the leaflet, telling cnn it's a clear provocation. the notice says jews much register because they supported protesters in kiev who drove out the country's goformer presiden. this rabbi says the jews of donetsk believe they'r