I see Trump's rhetoric as so detached from reality, that I can't think of any current, relevant people on "the other side" that would come close. Who do you have in mind, exactly?
Repealing the bill of rights is obviously not something Clinton or Sanders have ever proposed and certainly have not been screaming it on national television like Trump
This is absurdity of the tribe of Alex Jones
Hillary "It was all just a response to a video" Clinton
Bernie "Terrorism is caused by global warming" Sanders
Harry “light-skinned” and speaking “with no Negro dialect, unless he wanted to have one.” Reid
Al “White folks was in the caves while we [blacks] was building empires … We built pyramids before Donald Trump ever knew what architecture was … we taught philosophy and astrology and mathematics before Socrates and them Greek homos ever got around to it.” Sharpton
Barack "If you like your health insurance, you can keep your health insurance" Obama
Nancy "We have to pass it to find out what's in it" Pelosi
Elizabeth "I'm Indian because my ancestors had high cheekbones" Warren
Harry "Mitt Romney didn't pay any taxes" Reid
Hank "I'm not sure if Guam can tip over" Johnson
Leland "I am a leading gun proponent, but am running a illegal gun trafficking business on the side" Lee
Al "the entire North ‘polarized’ cap will disappear in 5 years" Gore
Just a few
The difference is that the fringe, radical right wing beliefs have been mainstreamed. The left has nothing like that.
David Neiwert (Orcinus) has done a great job chronicling the steady encroachment of hate speech, eliminationist rhetoric, white supremacy, etc. As a journalist, Neiwert has long history with many of the players. He attends their events and interviews them. Kind of like watching Fox News, so we don't have to. https://en.wikipedia.org/wiki/David_Neiwert
Every person has some goofy beliefs. If the wingers keep to themselves, I don't mind.
But some things do push my buttons.
#1 Hypocrisy. Like hating on "illegals" and then hiring them to work on your house. Or railing against welfare while sucking on the government's teat.
#2 Victimhood, persecution complex, clutching at pearls. There's a subset of the right wing that are just a bunch of cry babies, with no real equivalent on the left.
#3 False equivalence. Personal example. A political colleague wrote that our senator should be burned at the stake for some imagined betrayal. Flat out hate speech. So I called him on it. In turn, he stated that the Rodney King riots in LA were an example of left wing hate speech. Um, what? And then he wanted me to be accountable for the actions of some people 20 years past. Um, okay.
Like goofy beliefs, I don't mind cognitive dissonance either. But trying to wrap an opponent up in one's delusions is just trolling.