Nonsense - if a second referendum has remain win, when it has become abundantly clear what Brexit means, then that is democracy in action. If people want to riot or go right wing, fine, let them. And kettle the everloving crap out of them when they do for breaking law and order.
The problem with the initial referendum was that it wasn't defined. Lies were told, far more on the leave side than remain - that's an unavoidable fact. If anything, blindly following the first referendum - which by the way was completely non-binary - given its' now well known flaws and we're now three years away from it with zero progress; THAT'S a subversion of democracy, because absolutely nobody voted for the situation we're in now and absolutely nobody voted to leave with no deal.