Even in jest I think it's horrible to suggest that somebody be murdered for their honest ideological differences, no matter how abhorrent or harmful.
As big a troll as he is, he seems to do it either to play devil's advocate or because he actually believes it--as opposed to somebody like Ann Coulter who will say anything to sell another fucking a book or a politician pandering to a despicable base to get re-elected.
In Coulter's case I'd be tempted to pull the trigger myself.
Not that I'd shed many tears if Scalia and Thomas were in a helicopter crash or something... actively wishing for such a thing is 1) a magical thinking waste of time 2) exactly what many right-wignuts did in praying for liberal justices to die just a few years ago... *don't* be like *them*.