If those MPs were so responsible, why did they fight tooth-and-nail in Parliament for do-or-die remain, and not attempt to vote for a sensible compromise that everyone could live with?
If there had been fewer people campaigning for a second referendum, and voting down everything else, they wouldn't have got what they wanted - but they might have got us to something like Single Market membership. Which I think is a compromise that most voters could live with.
But that died in the joys of voting for unreastic things like eternal delay to any decision and extensions of the Article 50 process with no even vague suggestion of why.
OK, I admit that neither main party's leadership helped. But May even went back to the House for indicative votes to see if people would compromise, and they didn't. This attempt to claim that one set of people are the "sensible / clever / honourable" ones and everyone who disagrees isn't - is one of the main things that's caused the polarisation in politics. And that's as much the fault of people like Ken Clarke (who I'm otherwise a big fan of) as it is Rees Mogg.