"The best way to engage with our political adversaries is to murder them" is not, in even a nominal democracy, a notion supported by good people. This isn't a matter of polite disagreement or a harmless joke or the dreaded POLITICAL CORRECTNESS RUN AMOK. A candidate of a major party for the Presidency of the United States just glibly recommended that his supporters will probably have to assassinate the other candidate if she wins. A person who treats that dismissively is a person categorically unfit to be called civilized, to say nothing of the people who actively endorse such vulgar barbarism.