The side with no idealism is bound to lose, because for individuals it's better to run than to fight. Tragedy of the commons.

But what you're doing is a category error. It's a completely different thing to ask your enemy to surrender from asking your ally (in a loose sense) to surrender.

Japan was facing a superpower with unlimited resources. Ukraine is facing a second-rate region power which has nothing going for them besides nukes and a large pool of servile and suicidal recruits (so a bit like Japan in that sense). Not exactly equivalent situations?

You obviously are not well read on the subject or have any idea what you are talking about.

"They only have nuclear weapons"

Just beyond clueless.

What other subject can you lecture us on that you don't have the first clue about?