Kach was a far-right political party in Israel. Founded by Rabbi Meir Kahane in the early 1970s, and following his Jewish nationalist ideology (subsequently dubbed Kahanism), the party entered the Knesset in 1984 after several electoral failures.
The party was also barred from standing in the 1992 election, and both organisations were banned outright in 1994.
Today both groups are considered terrorist organisations by Israel, Canada, the European Union and the United States.
The groups are believed to have an overlapping core membership of less than 100 people.