“The news of Sirhan’s potential release hit me hard this weekend,” filmmaker Michael Moore wrote. “No, this assassin must not be set free.”

Few have voiced their opposition as loudly as Harvard Law School Professor Emeritus Laurence Tribe. A longtime prominent liberal voice, Tribe has been on a nonstop campaign to stop Sirhan’s parole. Before the parole panel even met — with no apparent investigation, let alone evidence — Tribe, referring to Sirhan, wrote on Twitter, “Even at 77, he could be a threat.”

The day the panel recommended parole, Tribe tweeted, “The plea by two of RFK’s sons to release Sirhan Sirhan should count for nothing. RFK’s assassination was a crime against the people of California and America, not just against the Kennedy family. Justice and the safety of potential future victims aren’t theirs to give away.”

Then when Kennedy’s other children issued a statement in opposition to parole, Tribe tweeted in all caps: “Governor [Gavin] Newsom: PLEASE LISTEN TO THESE SIX CHILDREN OF BOBBY KENNEDY.”