The other missing part is that Nagorno-Karabakh was moved from Armenia to Azerbaijan by Stalin in order to mess up the region (reminding of Crimea) even though

The other missing part is that Nagorno-Karabakh was moved from Armenia to Azerbaijan by Stalin in order to mess up the region (reminding of Crimea) even though the population was massively of Armenian ethnicity. After the USSR dissolved Azerbaijan held pogroms in Baku (1990), pushed all the Armenians to NK (at which point the NK population was 98% Armenians) and started eradicating their culture. Armenia started occupying Nagorno-Karabakh in 1991 after these things happened. Add to this that Azeris are ethnically and historically related to the Turkish, who are responsible for genocide of Armenians in the early 20th century and have been denying it since, and you can see why Armenian occupation of NK deserves little more than a footnote.