Why should "fact checkers" at Google, Twitter, Yahoo, Facebuck and the rest be trusted? Don't they all just recycle popular OPINION?

Honestly I have never trusted any of them as far as I can throw them. But you take your chances.

Facts are facts.  The truth has no bias.  If it weren't for Right Wing propaganda outlets like Breitbart, Newsmax, OAN, and Fox there would be no need for fact checking their lies.

Your perception of the world around you

(because Im sure this isn't your only misguided question)

is wrong on several levels.  I do have to ask though, do you understand that a fact checkers job is

"to CONFIRM the TRUTH of an assertion made in speech or writing" and therefore cannot be biased ?

Once you've absorbed that tidbit of information you [should] be able to see just how far out of left field your perception is, [should] if there's any normal brain function. 

You don't quite understand the concept of a "fact checker", do you?

ask them not us...we dont read minds.