MDg
If only it were black and white life would be much simpler. It is also black and white that it is assur to do anything to be mezalzel yom tov by indicating that it is chol.
As for “dwell” in the Sukah (which would presumably include sleeping) to the best of my knowledge nobody holds you do this on shemini atzeres Dthe Darchei Moshe brings this besehm the Rosh and tur for the reason mentined above. That “sitting” is alowed becasue we sometimes do it with no mitzvah, which is not so for sleeping. So Dwelling/sleeping in sukah is presumably assur (read not optional but assur) as for “sitting” assuming it is something we do even when not a mitzvah, thus not being mezalzel in yom tov then (and only then) can we eat in the sukah on shemini atzaeres
Getting back to Yom ha’atzmaot…
Chanukah does not celebrate the end of war nor the ability to live in peace. The war continued for several years after liberating the beis hamikdash. IT is black and white in megilas taanis (with several days commemorating battles that took place after Chanukah eg Yom nikanor) and lehavdil Josephus