NATO is a defensive alliance. If France went to Ukraine, other members wouldn't have to follow, only if it spills back into NATO territory and the corresponding member state requests aid.
It's the same thing as when not many nations followed the Yanks on their Middle Eastern adventures.
Which without a shadow of a doubt would happen. That's what I'm getting at
Not necessarily. Russians attacking Poland in response to a limited French deployment would cross an actual red line, that would force every NATO nation, even Hungary, even the US, to intervene directly.
It would turn the logic of the war around, with Russia being the country being struck from places they can't retaliate at.
You mean NONE of the times?
I mean they are not obligated to. Look at Yemen. Do you see Finnish and Polish forces there? If NATO was involved, you would.