You can have whatever image you choose to have, zigzagman, about how viewers of Fox News look....plenty of people believe that the viewers of PBS are Birkenstock wearing, nuts and berries eating, vegan, coastal Liberals. It doesn't mean that is fact, for either group. Or that voicing such a view is all that appropriate, although, as in religion, we are all entitled to our beliefs.....so, however inaccurate it may be, you can say, "My image of Fox News viewers is...........", but you can't state as fact that they are all fat, pasty white people.
You CAN look up the demographics of any particular news organizations listeners or watchers, and state something like "the large majority of Fox News viewers are white and middle-aged" if that is provable and true (I have no idea whether or not it is), or post a study of the demographic of income and/or education of PBS viewers (I have no idea what that would be, either)........
But.....it doesn't help the discussion to characterize people that way, especially if you can't back it up with facts. Just needlessly offensive, especially to Fox News viewers. JMHO