Earlier quoted context omitted.
I think it's rhetorically effective, in that shallow thinkers have been trained for years to reflexively revile Nixon. If we argued merely on the merits, they might worry about LEO jobs or housewives hooked on patent medicines (i.e., stupid arguments we've seen before). It's best to short-circuit all that detailed disputation with a simple "Drug War = Nixon = Bad". Very few thinking people without a personal economic…
Ouch, such a gross way of thinking. And people wonder why things are getting so divisive. No matter who you are, there are lots of people who disagree with you on public policy who aren't morons. Treating them like morons encourages them to hate you and not listen to anything you say.
Basically, the audience you and I usually interact with, e.g. here on HN, and probably at work, assuming you're in tech also, is comprised largely of logical thinkers. We don't have a lot of experience dealing with people who have more emotional thinking characteristics, so we assume that using an entirely logical argument is the only correct way to change people's minds.
I can't find numbers, and I don't know how much, or if, this has been studied, but I think a large portion of the population thinks more emotionally than we would expect them to. I don't necessarily think that's a negative thing, as emotional thinking helps, e.g. bind us together in cohesive communities even though the individuals in that community might be very different from each other on a personal level, because even though they're different people, they feel an emotional attachment to the same community.