Rhetoric 101, slow learners' edition

As most things, not all rhetoricians are created equal. The God-Emperor and the Big Bear are naturals at rhetoric, whereas yours truly is a lot closer to the Supreme Dark Lord in terms of rhetorical ability. However, there are still some fundamental qualities of a good rhetorical attack. Allow me to identify and elucidate three of them. First, thre must be a modicum of truth. Second, it must be short. Third, it must fit the medium.

The first criterion is rather obvious. The best rhetoric is rooted in the truth. Not in the precise, dialectical truth as much as the general idea is correct. If it points to a truth that is uncomfortable to the target, so much the better. That is why 'racism' works so well against most white people. Deep down, they are a little bit 'racist', because everyone is and there's nothing wrong with it. But they like to think of themselves as anti-racist, so it works. Same thing with calling the Pedophile Left, well, just that. The evidence is overwhelming that they're being weird to kids, and nobody wants to be a pedophile.
Alternatively, it could be something that activates a well established spell. Think putting a star-crossed banner, the seventeenth letter of the alphabet, or WWG1WGA on your Coronu-mask. You have to wear the mask because of the mystery virus that kills nobody, so they cannot say anything.

The second criterion is that the attack must be short, and simple. This is why 'dEmS aRe tHe rEaL rAyCiSs' never worked on anyone, anywhere, in any shape or form whatsoever. It's long, complicated, and requires a detailed historical analysis. I don't care if it's dialectically true, and neither does anybody else. If you unironically used D3R in conversation even once, please run every future attempt at rhetoric past someone else before you use it in public.

Thirdly, like everything else you say or post, the rhetorical attack must fit the medium. Making fun of Creepy Uncle Joe's obvious dementia in your Boomer-laden church group will not work. Pointing out his obvious pedophilia to a single mom will work wonders though.

There it is, the three criteria for good rhetoric, from one dialectician to another. Please comment any other examples of horrible rhetoric, so we can avoid them in the future.