Oh boy, oh boy, oh boy!
I could really sinnk my teeth into such a class! I take it that, since you speak of this as an elective class (since you dropped it), that it's a college level class and not high school?
Man, whenever I get around to taking some more college courses I've just GOT to sign myself up for something like this! That and philosophy courses...boy could I have some fun with these!
I'm the kind of guy who is straight forward, and if I'm in school, especially one where I'm paying for all the classes, I expect to receive my training/education as a straight-up event in accordance with the expected curriculum. Deviations are expected and acceptable if they are in compliance with the goal of the class. But slinging personal bovine fertilizer is NOT acceptable to me.
And I'll have absolutely no problems either challenging it or calling the individual to the carpet on his responsibilities over the issue. And the absolute LAST thing any such person will want to do to me is yell at me over it, most especially in a public forum.
That said, you have a valid perspective too, which is essentially that this guy (and his class) is a waste of your time and therefore not worth any further effort on your part. And that's perfectly acceptable, too.
Plenty of examples of "mob voters" can be cited on both sides of the fence. For instance, I'd like to know his opinion on, say, union strike tactics and enforced union membership rules and dues. If ever there was an area where "mob voters" and violence (and extortion) could be linked together, this would be it.
Anyway, it would be quite difficult to battle this guy on his own terms, by which I mean to challenge him directly on any given topic. It's likely to fail for two important reasons (not counting the fact that he's the instructor and controls the curriculum):
1. He'll already have a defense against most anything you'll bring up, valid or not.
2. He'll take you off into a tangent, distracting you from any effective debate you may have.
Therefore, the best way to go toe-to-toe with this guy is to use his own tactics against him...that is, to tangentally attack his own suppositions using the educational topic he's putting forth.
For example, consider the tactic you mentioned:
"Mob voter" (presumably a bad or vindictive thing) illustrated by the example of the NRA. The NRA is placed in a bad light by a set example, thereby linking "mob voter" to "NRA" to "bad thing" to "you're a bad person if you associate with the NRA because you're part of the mob voters".
You can present your own example of "mob voter" by illustrating an example using "unions". And by "unions" you can also associate "tenured professors", if you wish. Then you place said union in a bad light by setting forth a specific example, thereby linking "mob voter" to "union" to "tenured professors" to "bad thing" to "you're a bad person if you associate with tenured professors because you're part of the mob voters".
Doing this does a couple things for you:
1. It keeps you from having to defend yourself against his own statements.
2. It tosses examples of his own philosophy back in his own face which publically demonstrates that his philosophy isn't a one way street AND it puts the onus of defense back in his lap. And the real beauty of this is that he cannot defend against your example without also tearing down the suppositions of his OWN example.
In effect, you'll be using his own efforts to tear down his own brash statements.
Remember...you can't mount an effective direct defense against him in a classroom environment because he controls the environment and he sets the agenda. All he has to do to shut you down is to call an end to your defense tactics in the name of continuing the class, if nothing else.
So you have to use his OWN training topics against him in what amounts to a verbal Judo maneuver, to use his own tactics against him. After all, you're discussing his curriculum in the classroom, not the NRA...right?
But don't yell...and do NOT accept being yelled at.
(All that said...I'm quite a bit older now, and set in my own ways by training, experience, and pure cussedness. I didn't get to be a Chief in the Navy because of my own naive teen and college days. I got there because I grew up in the years following.)