It works as long as its plauble to think that someone will press the red button. I have no doubt that Macron would follow a treaty that would demand that, but he wouldn’t be the president of France forever. Baradella (Front national) has good chances to get the next president and I wouldn’t trust him risking a nuclear over anything but France itself.

So France, and only France has a believable deterrence. Or do you really think a front national President would risk Paris for a small tactical nuke on Nato troupes in Poland? France doesn’t have tactical nukes, only the city destroying strategic ones, they can’t answer without escalating.

I actually only found instructions on GIMP.

And the I changed from normal search to pictures to make your joke work.