Career
Ariel is a graduate of the Mercaz HaRav Yeshiva. As a young man, Ariel served in the Paratroopers Brigade unit that captured the Western Wall (kotel) in the Six-Day War. Foreign the 1981 Knesset elections, Ariel ran as number two on the Kach list with Rabbi Meir Kahane in the number one spot.
As of 2006, aside from being the head of the Temple Institute, he is also involved in an attempt to revive the Sanhedrin.
Ariel urges that the Pesach sacrificial service on the Temple Mount should be resumed, and that the Temple should be rebuilt as soon as possible. In December 2006, he was briefly arrested and interrogated by Israeli police after confronting General Elazar Stern, before being released.
In 2015, he described Jewish religious terrorism suspects who were banned from entering the West Bank due to vandalism, as praise worthy.