Incredible. Not any statement, but left oriented, because of course lying and half-truths are limited to people with the political orientation you don't agree with...

EVERY uncited statement needs double checking. Even on non-contentious topics.

Cited statements also need double checking. Frequently there's a game of telephone going on and the original research has been distorted.

This is not just a left wing phenomena, it's a phenomena anywhere you get people who aren't completely dispassionate observers (this excludes all advertiser funded media as they are incentivized to make things interesting and engaging).