liberals used to defend free speech absolutely. thanks, professor.uc heather mcdonald is one of the so-called right-wing provocateurs professor hanlon says can be silenced. earlier this month, she tried to speak about how widespread antipolice rhetoric is in this country and how it is making us less safe. instead of being allowed to speak, this is what happened. tucker: heather mac donald joins us tonight. heather, thanks a lot for coming on. i hope you just heard what professor hanlon from colby college just said, which is that some people s views just aren ta worth hearing and that colleges have a right to squelch those views. what do you think about that?lu the historical amnesia is