Agreed that calling large chunks of the population idiots isn't a road we should be going down.
However when you've got people who were lifelong Labour voters but voted Conservative in this election queueing up to be on TV declaring they voted that way because of what's happened to the NHS in the last 9 years, universal credit, increase in homelessness etc then you surely have to question how they have come to the conclusion that Labour are to blame for those things.
If you don't then the danger is Labour elect a new leader, therefore assuming the Corbyn issue is removed, and with Brexit also a non-issue by the next election do they just assume everything will work out? Nothing to suggest that in 5 years if things have gone to shit those voters who have blamed Labour for the mess of the last 9 years will suddenly 'see the light'.