OK the majority of the electorate when put to the test at the last referendum, last general election, and again when the withdrawal act passed by majority into law in parliament. Three democratic tests won by leave to zero by remain. How much more conclusive than that do you want?
Can you show that it won't though? What about the economic benefits on top of the £39bn of being able to trade globally rather than being restricted by protectionist EU policies. With a 3-0 democratic win for leave it is not for the brexit side to prove anything but rather for remain to prove them wrong. They haven't, they can't and the won't.
It is no brexit that has the democratic deficit here, not no deal.