I really do despair sometimes. "We came together for the greater good" - and just left the politicians to it? There was no argument about Churchill taking over? (Did you believe that film that had Churchill taking soundings from Londoners on the tube?) Here's what did for Chamberlain - an Admiral of the Fleet, who happened to be an MP, in the Commons on May 7, 1940, on the Norway campaign: "The German naval force, however, consisted of only two destroyers which should and could have been speedily eliminated with little risk. This is not a criticism from knowledge after the event, as ever since 16th April I have been urging the Admiralty to take more vigorous naval action, and in view of the Italian bluster I proposed that the naval co-operation could have been afforded by old ships, of which we could risk the loss without affecting the strength of the Fleet. When I realised how badly things were going later, and saw another Gallipoli looming ahead, I never ceased importuning the Admiralty and the War Cabinet to let me take all responsibility and organise and lead the attack." (The Daily Express had a placard - "War Office Deny British Disaster")
No-one gave up thinking about how the war should be conducted.
The greater good (for us and the EU) would be abandon Brexit. The next would be a realistic deal. Disagree about what that is, but don't make out that it's none of our bloody business.