I think Tory MP, Sam Gyimah, who resigned from the government last year, puts the case well in this article in The Spectator-
"I did not want to be an ex-minister. I did not want to be here. I have worked for the last three years to implement Brexit in my ministerial roles. But to barrel forward with Brexit in the name of delivering the referendum result, when we know that future generations will look back and never forgive us is a dereliction of our duty as public servants. In public life we sometimes have to face up to difficult choices at difficult times. And if we cannot honestly recommend any of the deals in front of us we should have the courage to call a halt.
I hear many people say this will be a huge betrayal of referendum result, that it will be a rallying cry for the worst type of popular politics and politicians. The strange thing is the same people who suggest that somehow the public is ready to take to the streets, are those who say people are bored of Brexit and want to move on. The betrayal narrative has become the new project fear. Those who for years campaigned for a referendum and more direct democracy now say you can have too much democracy. But if Brexit goes ahead without more considered debate, the vast majority will feel betrayed whatever form it takes. Today we worry that certain sections of the public will be angry with this course, but if we do not bring the people along, we risk wider discontent.
Those who want No Deal to reheat their own versions of Thatcherism will cry betrayal if the PM gets her deal. The Corbynistas will blame the Conservatives for everything that goes wrong and have every incentive to do so. There will be people supporting the PM’s deal now trusting that somehow this is final who will be furious to find out that it isn’t the end of the matter at all, and in the ensuing negotiations, current wins may not survive.
And there will be lots of people — particularly the young – who will probably never forgive the Conservatives or perhaps politicians in general if the government tries to ram through something so obviously flawed.
To be clear, I do not wish to downplay concerns about what another referendum will entail. I share the fears and anxieties of many people. Countries like Spain, Canada, and Australia have had multiple referenda on the same issue, for many of us this was a singular and traumatic experience. But how can we be frightened of asking a more informed question?
And if I can turn my attention to the Conservative Party interest for a second, the effects of Brexit will reverberate for years to come, so it is in our interest that the country is brought along with eyes wide open.
Democracy, after all, is not a single event. It is a process, and often conditions demand multiple touches with citizens on seminal issues, especially at a time of historic flux. Asking the people the right questions about what future they want will ultimately strengthen the democratic basis for what is an irreversible decision.
In this crisis of our democracy, my answer is that there should be more democracy, not less."
blogs.spectator.co.uk/2019/01/its-time-to-think-the-unthinkable-on-brexit/