MeanMrMustard, I judge science by examining science and what scientists say are their discoveries of science. Scientologists (as a group) are not scientists, though they might have some members who are scientists (though not scientists of Scientology since Scientology is not a true science).
I determine what many conservatives believe and say about conservatism by examining a sample of statements made by a sample of conservatives (such as a number of people on this web site and a number of conservative spokespeople in the news media).
Regarding your question about Richard Spencer, I don't think I read anything by him nor ever listened to him. But, I determine what neo-Nazi people and antisemitic conspiracy theorists believe by reading a number of their writings on those subjects and by listening to some of what they have said on those subjects. For example, I have read a portion (in English) of Adolf Hitler's Mein Kampf's autobiography book, a portion (in English) of some of his speeches, and the political platform of the American Nazi Party (ANP).
dropoffyourkeylee, thanks for creating this forum topic and for posting the link to the video about Steven Hassan. Despite a number of the views posting in this forum topic about that video, I agree with what Steven Hassan said in the CNN video.