Scud has it right. We live in a representative democracy - not a mobocracy. We elect a governemnt every 5 years (max) and have to trust them to get on with it. El Presidente, Man-o- Straw and Buffhoon do have access to material and assessments which I doubt any one on this forum has.
There was no mention of war with Germany in the Conservative manifesto of 193(6?). I was at a prep school the day Chamberlain flew back from Munich with his piece of paper, signed by Adolf Hitler, guaranteeing "peace in our time". We were almost given a half-holiday! If there had been such things as polls in the '30s there would have been an overwhelming majority in favour of peace and reconciliation (appeasement). We went to war on 3 Sep 39 on account of a mutual treaty with the Poles - not because of public demand. Some perfectly respectable historians would argue that it was a wrong decision, but they would not have dared say so after Churchill took over in 1940. And at least the Jews should be eternally grateful. If we had not made a stand they would have been wiped out.
One of the reasons the Americans hang back until Dec 40 (and Roosevelt said this) was to bankrupt the British Empire. It was cash-and-carry for their kit until lease-lend kicked in, and in that period we liquidated our entire national investment portfolio in the USA. And, of course, after the war there was no Marshall Plan aid for the UK. Indeed, we introduced bread rationing in 1946 so as to feed the Germans!
Having said that, warts and all, the Americans are the best show in town for the defence of western civilisation. Viva the Pax Americana! And sod the UN!