I tried using Ukrainian politeness on people in Crimea in ~2011 and got what amounted to "speak Russian or die Americano running dog," so my theory of what happened there is considerably simpler.
You have the Tatar Exile during WWII, people re-settling the area, and then later Crimea was borderline on being independent or part of Ukraine during the dissolution.
So you end up with the fact that, whether right or wrong, Crimea is full of ethnic Russians who were lukewarm about being part of Ukraine in the first place. So as sketchy as the whole annexation was, was it wrong? I honestly can't say it is, which is probably why Russia felt they were able to take that chance.
As a Russian who generally thinks that both Russia and NATO need to back down from the pissing contests they engage in...
Yes, it was wrong. Ukraine was done wrong by it. It was not done legally. Even if it was done with respect to the doctrine of self-determinism (I generally approve of secessionist movements), it was not done correctly. There are correct means of going about secession, and the War in Donbass was not one of them. It was a thin pretense for other geopolitical ambitions.
https://en.wikipedia.org/wiki/Marcher_Lord
(What I wonder is how Baskov's marriage had been supposed to take place in Grozny a few years back. On the equation svadba==vodka, my best guess is that although the sale of alcohol is heavily controlled in the Chechen Republic, the consumption of alcohol, at a private party, would not have been.)
Also related: https://news.ycombinator.com/item?id=23914667
[1] from time to time I've seen Kadyrov invoke the spectre of foreign separatist influences. Given his paternity and history, a wild guess from the outside is that he'd likely know about such things, from back when the influences were on his side.
Things were different in 2014 when volunteer battalions of such nationalists were organized under the cover provided by the Ministry of Interior Affairs and thus were legally armed, and "the trains and buses of friendship" were about to go to Crimea and Eastern Ukraine. Well, they did still go to Eastern Ukraine while the Crimeans got lucky that Putin decided that it will boost his rating.
I have no idea where it ranks on in terms of desirable places to go, but judging from the Instagrams of Russian friends, the Maldives belong somewhere on this list. :)
Artek then: https://www.youtube.com/watch?v=NepI7BTYpnY
and now: https://www.youtube.com/watch?v=iMTN6udbBKc