I have to say I'm on pigeon's side with this.
I mean, fuck, the window for acceptable discussion on popular websites as a whole has moved so much, I feel. Look at the stuff on Reddit and Twitter that's just so racist, sexist, and hateful, and it's just like, okay, that exists in the open now. People are exposed to that now, emboldened by it, think it's okay. Young people too. (Maybe not here specifically, but in general)
I think it's good to show that is shameful and not deserving of respect like any other position.
Trump isn't some coherent, reasonable politician with actual policies. He's a white nationalist and that's it. That is all that he is. I'm not going to argue about his merit and how he's actually a good candidate worthy of support, though I will argue about his specific non-hate policies (that few that exist). Similarly, I'm not gonna debate a Neo-Nazi or a Klansmen on supporting vile pieces of shit, but I will argue what they think about economics.
If someone thinks Trump has a better economic plan, fine, I'll argue that. But if you actually support Trump as a whole, taking everything he stands for, then I'm not gonna give you the dignity that you're denying all the people Trump would hurt.