It is always tempting to think everyone else is immoderate and unreasonable, the only centered and reasonable worldview being your own. All concomitant policies are, by default, the only ones worthy of consideration and those of "the other side" not worthy of consideration, let alone discussion. This tendency seems to fuel the outlook of the Left.
As Joseph Schumpeter noted about disciples of "the prophet Marx" and their academic and intellectual adherents, dissent from and opposition to unproved socialist dogma is not just an error, it is a sin. Opposition is not wrong intellectually; it is heresy and morally reprehesible. (See first footnote in chapter one, Capitalism, Socialism, and Democracy)
Most telling are the responses between 2:33 and 4:14.
