On a point of historical accuracy the prevailing attitude in the Thirties was to avoid war at all costs, virtually no matter what Hitler did. Churchill was a very isolated voice. It was only once Hitler made it impossible not to fight him that we got stuck in.
Though I do think the response once we were in would be very different today, I imagine riots if youngsters were drafted to fight.
We’ve had the debate about patriotism on here before. Just because I thought the best thing for my country would be to stay in the EU doesn’t make me any less of a patriot than you, it just means we have different opinions about what is best for the country. Though doubtless I am less of a patriot than you in your terms, even though I voted country on club v country, and that’s because I am cursed not to have unquestioning faith in anything at all - my problem, not an argument starter.