What about all those smaller wars we have entered into in recent times? With all the loss of (very often innocent) life. All the destabilisation of lives in foreign countries albeit the case that those lives were not completely hunky-dory beforehand?
Is it really all down to world economics. I don't think it should be.
I take some small comfort when I see someone confidently stating "It;s definitely going to happen" in the memory of similar certainties being boasted about 29th March and some other date in April when it didn't happen.
We never voted to be at war. We ended up at war in circumstances we could not avoid.
We never voted for a catastrophic no-deal brexit either - which should never be allowed to happen.
No nation would ever knowingly vote to be so much worse off in every way for a generation or more unless a large chunk of the population had gone mad - or been brainwashed for years by malign foreign forces with their own agenda - who do not have the interests of that nation at hear/.
None of the wars mentioned entailed a constitutional crisis. They may have been 'crises', but they were 'run' by constitutionally 'correct' governments. So while the thread title is accurate, the content of the OP is meaningless.
If people really have to reference WW2, maybe they should study the politics of 1930s Germany and consider the parallels with what's happening in the UK now.
People lost their lives to prevent it happening, but some numbskulls have caused history to repeat itself.