The first Red Scare was in 1919 and communism was a big enough idea in the US that the government was putting communists in prison

Their definition of the “left” section of their spectrum:

Sources with a Left AllSides Media Bias Rating™ display bias in ways that strongly align with liberal, progressive, or left-wing thought and/or policy agendas.

Even they recognize that liberal and progressive ideas are separate from leftwing ideas, but for some reason have chosen to lump them into a single group. Likely because there are very few leftwing media outlets and none of them have any real name recognition when compared to CNN, MSNBC, etc.

If you think those are leftwing news sources then you probably need to educate yourself a bit more on political ideology.

Gotta watch out for “hidden societies” because it’s almost always a dog whistle for Jewish people