The thing is your electorate let itself be manipulated like that and as you said the perpetrators are still very much at large. It follows they will manipulate the electorate again and there’s no reason to believe the same demographic won’t easily fall for new lies. (Unless they died off.)
This sucks for the Brits who knew better but it also means the EU would let an unreliable partner back in if nothing changed. It seems the pro Brexit crowd will need to learn the hard way that no really you were lied to and you still have to bear the consequences of your own actions (vote).
Being lied to isn’t an excuse to accept racist fearmongering and plainly suicidal economic reasoning. Nor is it an excuse for the project fear slander that happened at the time. They were lied to and were also told the truth. And you who voted to stay also need to learn that your vote doesn’t abdicate Britain either. You’re in this together.