Rabbi Yisrael Ariel, founder of the Temple Institute, gets harassed by the Israeli government on various pretexts.
His views are religious Zionist and he was close to Rabbi Meir Kahane.
He also promotes
http://www.thesanhedrin.org/en/index.php/The_Re-established_Jewish_Sanhedrin
which, like the Temple Institute, lacks the authority of the Councils of Torah Sages.
Thank you. It would seem to be hard to find qualified judges, yet, for reestablishing the Sanhedrin.