He is addressing the question of why right wingers are not in academia. Because they don't want jobs in academia.
Once again you are proving yourself an idiot.
An affirming the consequent fallacy is a formal fallacy. Here it works like this:
Almost all professors / scientists at universities in the natural sciences are Democrats.
Republicans are anti-science
Therefore, all professors / scientists are Democrats because Republicans are anti-science.
No proof is offered that professors / scientists at universities are Democrats because Republicans are supposedly anti-science.
To the contrary, it is far more likely that most academics in the field of science are Democrats--at least on record--because it aligns with the university's administration and the wide range of academics in other, particularly liberal arts, fields. That is, they say they are Democrats to get along and not be bothered by campus politics.
The Republican Senate Majority Leader of North Carolina accused UNC of discriminating against Republican scientists. A professor offered a simpler explanation.
www.businessinsider.com
www.nas.org
Immersion in a culture of Leftist politics is arguably another reason. If most of your peers, again particularly in the liberal arts, are Leftists, there is pressure for you to conform or be cast out.
College graduates are now a firmly Democratic bloc, and they are shaping the party’s future. Those without degrees, by contrast, have flocked to Republicans.
www.nytimes.com
Yet another reason might be that academics, including those in the sciences, are well-paid and see some degree of socialism and Leftist ideas as a good thing because they can afford them.
The Society Pages (TSP) is an open-access social science project headquartered in the Department of Sociology at the University of Minnesota
thesocietypages.org
Despite strong opinions and partisan viewpoints, an Education Week Research Center survey shows teachers, principals, and administrators working to keep those divisions out of the classroom.
www.edweek.org
So, some simplistic argument that academics are Democrats (aka Leftists today) because Republicans are "anti-science" is both simplistic and juvenile. The OP argument is a fail.
