Discuss the difference between opinions and actions, and how the implementation of evil opinions can be considered a form of mental illness.
It's not based on their opinions..any more than a "criminal" is viewed on his or her opinions.  It's based on their ACTIONS, or inactions.  Does the opinion of an all white utopian society, elimination of "human weeds" such as "Negroes and Jews", elimination or sterilization of those in mental institutions and prisons sound like someone with a mental illness?  Because those are "opinions" of the early 20th century "progressives" who not only "opined", but acted on those...and even Hitler borrowed some of their ideas.  The loons who "opined" on the evils of drink got the 18th Amendment passed, and the federal government finally resorted to putting wood alcohol in the grain alcohol, because everything else they put in to stop people drinking was distilled out.  As a result, the US Government murdered around 10,000 people.  Opinions are fine, and widely held...everyone has one.  Evil opinions put into action however, IS a mental illness.