I feel that Putin must be getting rattled if he has started to feel the need to threaten Sweden and Finland: "If you join NATO you will suffer serious consequences."
Why does he think those two nations have not joined NATO already? Because they have always known that Russia is being led by a paranoid bully (this applies since 1917, name not needed, and also since 1949, name still not needed) who would throw everyone's toys out of the pram if they upset him by telling him they really, really didn't want to be part of his territory. (They did fight a bloody war to avoid it, in the case of Finland, but some people can't take a hint.)
As for "denazification", that's simple. Nazi is a boo-word, especially in Russia where they had a pretty bad time after Stalin stopped being an ally of Hitler's under the Molotov–Ribbentrop Treaty and Hitler invaded them. Best to apply it to your opponents, however inappropriate it may be, before everyone notices how very well it applies to you.
Incidentally, history repeats itself all over the place. The Soviets invaded Poland in 1939, about a fortnight after Hitler did, and their excuse? "Concern for ethnic Ukrainians and Belarusians." Definitely familiar, that. Stalin bit off more than he could chew with Finland, and it cost him the lives of as many as a million soldiers; I hope Ukraine is as impossible a lump for Putin to swallow, though I feel very sorry for the recruits who have been sent to fight in Ukraine without proper training. And indeed for anyone in the Russian army.