According to wikipedia:
"In the early 1970s, Bob Dylan was accused of being a supporter of Rabbi Meir Kahane’s Jewish Defense League.[6] In a Time Magazine interview, Dylan said about Kahane, "He's a really sincere guy. He's really put it all together."[7]
According to Kahane, Dylan did attend several meetings of the Jewish Defense League in order to find out "what we're all about"[8] and started to have talks with the rabbi."