Is there a block list of every Russian propaganda site in existence? Who maintains such a list? Or should Google have to manually review every website every day to check if it is part of that set?
They're some of the biggest ones, and easily discernable by the most cursory glances. Are you trying to say that their efforts will catch more hidden ones but not the obvious ones? If they can't even get the easy ones, why do you think they get any of them?