Why should they accept it? Because it was voted? That doesn't make it sacred or for any other reason "un-challengeable". It only means the only way to reverse such a (voted) decision is to call another vote. Which is very debatable (if it should be called), but that is a political discussion and ultimately a political decision, and that's what political parties are supposed to discuss and propose.
You can't have endless votes because nothing would get done. If there was another vote and it was just in favour of remain, what next? Have another one a year later and see if its gone back to leave? How many votes do you need to have before the government make a decision? At the end of the day people had plenty of time to come to a decision under the impression that there would only be one vote, so the outcome is the outcome. Now the government can decide to go against that decision if they really want to but it would be political suicide and a good way to alienate half of the voters.
The way I see it - from a great distance, and probably I am wrong - the voters were blissfully unaware of what they were deciding. "Sod the EU", "Rule Brittania", "Death to the Eurocrats", "Let's save our NHS", "We're full of immigrants", "Britain for the British" .... all this and much more was probably shouted in many pubs (and rallies) all over the UK.
They weren't unaware of what they were deciding and you will be surprised to hear that 17 million people aren't racist idiots, by making such a generalisation it doesn't seem you have any idea what you're talking about, and that your only source of information must be incredibly biased.
Oh, and regarding economics, it was "They (Europe) need us more than we need them" or "BMW will want to keep selling cars here" or "We will find new markets and, with freedom, we will make our own deals" "We are a global power" "There's always the Commonwealth" "if the italians don't behave we'll stop drinking Proseco" ... and other such nonsense. To talk sense was to be with "Project Fear" anyway.
The main argument is that we would have more freedom to make trade agreements with other parts of the world, which considering how inept the EU is at doing that, and how our trade with the EU has been steadily decreasing over the past decade and a half, I would hardly call it nonsense. As for Europe needing us more than we need them, although it is a bit of a stupid comment, it comes from the idea that neither side wants a bad deal, that people in the EU selling into the UK won't want to lose sales due to increased costs, and people in the UK won't want increased costs.
The predictions of immediate economic doom and gloom doesn't seem to be happening either, there were talks of an immediate recession after the vote, albiet only -0.4% over a year, far from the -7% in 2008, not that you would think that listening to the remain campaigners. In reality we've had 1.7% growth since the vote which is nothing particularly special, but definitely nothing to worry about. The FTSE 100 and 250 have also grown nicely since the vote at similar rates to what they were before it. The only major chance is in the value of the pound which seems to be creeping up again and the effect that has on the economy is a bit complicated.
Of course, guys as intellectually dishonest as Johnson and Gove cut through all this like a hot knife through butter. With the Labour party tied to a post-marxist leader that wants to re-nationalize or put Government's Money in struggling companies (something the liberal EU doesn't allow), all the UK's political class was either half-heartdly with "Remain" or passionately with "Leave". In the end, everything that was wrong with the country was the EU's fault. The writing was on the wall really.
If you don't think the UK political class was mostly for remain you really don't know what you're talking about, off the top of my head I think it was about 80% of MPs were in favour of remaining with a fairly small minority campaigning to leave. Every party leader, with the exception of UKIP obviously, was campaigning for remain, granted with varying degrees of enthusiasm when it comes to Corbyn but still.
So, starting on June 23rd 2016, the world has been witnessing a slow motion train wreck of huge proportions in progress.
As covered above, I don't know what you've been watching, but were doing just fine so far thanks.
I don't think there's any turning back too, and it won't be the Lib Dems actions that will achieve that. For the UK to reverse its decision it would take some humble pie eating, of such enormous significance that it just can't be done.
Also, and although some nice people say that the UK could return to the EU in the future, or even before if Brexit is reversed, a price will have to be paid. And it is a heavy one. For all I know, read and hear, the UK would need to beg. And would have to accept the Euro. And the rebate would cease. Meaning: all the magnificent opt outs very clever UK politicians in the past got through clever negotiation and in a position of strengh (some of them unique to the UK, like the rebate) are now forever gone.
I do think the UK will leave, probably it won't visibly crash out (because nobody will want a "crash", and cosmetics will be put in place), but from all I see it still amazes me how Brexit is ruining the entire political credibility of the country and of its politicians.
In the end, the Lib Dems are the only ones that get it right. But they have no votes, and will make no difference in the end.
Again more nonsense, and so speculative that I have no idea how you can base an opinion on it. We don't even know what the details of trade deal will be after we've left, so I have no idea why you pretend to know the details of an imaginary deal that we would make if we were to come back to the EU sometime in the far future.
As for the deal, the 3 main changes that were talked about in the campaign were an end to freedom of movement, the ability to make our own trade deals with countries outside of the EU and an end to the payments into the EU.
Freedom of movement is seen as a benefit by the EU, so if we no longer want it, surely that should make the deal worse for us in the EUs eyes, so why wouldn't they accept it if it's such a good thing? Just because we asked for it? If we asked to pay more money into the EU, I doubt they would say no to that, so either they think that freedom of movement is not beneficial to us, and were better off without it, or they don't want to give us a worse deal, both of which would be stupid positions for them to hold.
The ability to make our own trade deals doesn't really affect the EU as long as we still abide by our agreements with them, so I have no idea why they care. As for payments into the EU, although it is the least important of the 3, I really don't see why we should, most countries don't pay for access to the EU, in fact they receive money from it. For some weird reason, the countries that benefit the EU the most by being part of the trade agreement, also put the most money into it, and vice versa for the countries that contribute the least, which you would think if there were to be any payments for a mutually beneficial agreement is completely backwards.