That's apparently one of the problems. The so called left are aghast at the stupidity of the so called "out morons" that we forget that we have to debate with them and tell them why they are full of **** so we just call them thick ****s and forget to say why, they then use that as a reason to continue to be stupid.
Not everyone on the left is in favour of being in the EU and not everyone on the right wants out, but I get what you mean.
The problem is that a lot of this isn't actually about reasoning.
You could have a list of pros and cons, but some of it's speculative, as it's about the future.
It just gets ignored, as a significant minority of the right wing no longer listen to experts.
They'd prefer to hear from people who tell them what they want to hear, then go and do something entirely different.
Take Trump talking about Drain The Swamp:
“Funny how that term caught on, isn’t it? I told everyone - ‘I hate it!’. I hated it. I said, ‘oh, that’s so hokey, that’s so terrible.’"
"I said, ‘all right, I’ll try it.’ So like a month ago, I said ‘drain the swamp.’ Place went crazy. I said ‘woah’. Then I said it again."
"Then I started saying it like I meant it, right?"
Didn't mean it. Doesn't mean it. Won't do it. Installed a bunch of people that directly contradict it.
Reaction from his supporters? Nothing.