As noted, that was merely one example....(of course). Those seeking a broad perspective to frame opinions openly consider many sources and perspectives. Others, even those that may be intelligant in many other aspects of life, refer to limited and biased sources to reinforce their current opinions (not to be confused with facts). A useful tool to recognise this type of person is the tactic of attacking (attempting to silence or discredit) those who see an issue differently, those open to debate, and those who are not limited to narrow thinking or opinion on any issue.