A curious reality about Official Washington is that to have “credibility” you must accept the dominant “group thinks” whether they have any truth to them or not, a rule that applies to both the mainstream news media and the political world, even to people who deviate from the pack on other topics.
For instance, Sen. Bernie Sanders may proudly declare himself a “democratic socialist” – far outside the acceptable Washington norm – but he will still echo the typical propaganda about Syria, Russia, Iran and other “designated villains.” Like other progressives who spend years in Washington, he gets what you might called “Senate-ized,” adopting that institution’s conventional wisdom about “enemies” even if he may differ on whether to bomb them or not.
That pattern goes in spades for former Secretary of State Hillary Clinton and other consciously “centrist” politicians as well as media stars, like NBC’s Andrea Mitchell and Lester Holt, who were the moderators of Sunday’s Democratic presidential debate. They know what they know based on what “everybody who’s important” says, regardless of the evidence or lack thereof.