that 'they were just damaging property, nobody died, etc'., anyone repeats that crap to you,
The four, along with Bill Ayers, were among the leaders of the Weathermen terrorist group. In addition to the New York police officers killed, a 1970 pipe bomb in San Francisco set by the group killed another police officer and critically wounded another.
But remember, he's a 'respected English professor', etc. ad bullshit.