OK well there will be some exceptions. But the point stands: setting such a significant constitutional issue as this up as a winner takes all on a simple majority is not normal among most advanced democracies. Not normal, and definitely not wise.
Ill repeat what I said above. If the Brexit had won with that kind of a majority, there would be a clear mandate to deliver it. We would not have the kind of chaos we have in the UK right now.
@Strachans Cigar talks about civil unrest if we had set the terms of the referendum like that - which I think is complete nonsense BTW, but even if it were true - what have we got now? And what are we going to have if we leave without a deal? What will the 48% think if we leave on WTO terms and even half the predictions about how bad it will turn out are true? Are the majorities in cities, among educated, among young people, just going to shrug their shoulders and get on with it, because they lost an election by a paper thin margin, amid lies and broken election rules?
Conversely, what is going to happen if MPs decide to pull the plug on the whole thing and cancel Brexit altogether, because nobody can agree on what kind of Brexit they want, and 95% agree that leaving with no deal is sovereign suicide? I imagine the people who voted Brexit will be pretty damn pissed off, they will feel betrayed. I imagine there will be some serious civil unrest if that happens.
A lot of those same people, who voted Brexit and who would lose their shit if it was snatched away from them, would not have been similarly aggrieved if the terms of the original referendum had been clear. I think interest in the referendum would have been much lower, it would have been seen as a stitch up, there would have been grumbles from the minority of people who really, really give a shit about leaving the EU, rather than the many people who voted leave but if they hadnt been asked would have just got on with their lives. But nothing like the kind of shit that is brewing now.
Ultimately we live in a representative democracy. The idea that any referendum is the embodiment of our democracy is a complete nonsense. If people wanted to leave the EU that badly they should have voted UKIP in large enough numbers to force the issue in Parliament. But they never did. They may have posed a bit of a threat to the Tory party, but that is exactly the problem. The country is being torn apart right now because the Tory party wanted to shore up its support among nostalgic, grumpy old right wing dickheads. That is on Cameron.