You would appear to be conflating a whole load of things throughout your posts but I'll take this one sentence - the inference I have drawn is that ANYONE (your emphasis) of any political persuasion has no place 'moaning' (that's such a pejorative way to describe people expressing an opinion but that's by the by) about the goings on of tabloids (perhaps specifically Murdoch's ones) because politicians on both (or all) sides have at one time or another gained from this undesirable approach to journalism. That may be incorrect and it may be that your implication refers, solely, to politicians (or perhaps people specifically supporting a party at one time or any other).
If so then you have a point, if not then you spectacularly miss the possibility (often repeated until people are either red/blue in the face - whichever is their wont) that being largely either 'left' or 'right' does not automatically make one a supporter of whichever party is supposed to be, generally, representing that 'wing' or those that happen to be leading whichever party (or perhaps more accurately using said party as a vehicle for their own advancement).
I wasn't clear but by "both sides of the political divide" I did mean "politicians"