The Jewish Defense League is the organization founded by the late martyr Rabbi Meir Kahane, Of Blessed Memory in the year 1968 in New York City to defend Jewish, rights, property, individuals, institutions and honor by any means necessary. The JDL today is under the dynamic leadership of Irv Rubin, a longtime associate of the late Rabbi Kahane and has its international headquarters in Los Angeles, California. There is no issue facing the Jewish people today that the JDL won't tackle and unlike the so called "respectable" Jewish establishment organizations the JDL doesn't form commitees and study what needs to be done for years on end, thus wasting precious time and accomplishing absolutely nothing! The JDL takes concrete action to solve Jewish problems.
This comes from the Web Site of the JDL.