Denmark, no clue. But Greenland? The Arctic Circle is of increasing geopolitical importance and competition between Russia and America.
I can't see what would possibly lead to a Russian invasion of Denmark.
Seriously? I'm sure the fact that Ukrainians could see contrast with next-door Poland had nothing to do with Maidan... no, it was CIA, definitely.
The overthrow of the government was effected by armed militias, with a heavy far-right presence (e.g., pictures of Stepan Bandera, the Nazi collaborator who ethnically cleansed Poles from Western Ukraine during WWII). The US government had a hand in picking the successor government - there's even audio of the behind-the-scenes discussions. There was obviously popular support in Western Ukraine for Maidan, but there was also a lot of foreign involvement and the seizure of power itself was violent and unconstitutional.
From Crimea being part of Russia for centuries, having 60% russian ethnicity population, Ukraine government being toppled by nationalists and neo-nazis with US support, etc...
https://www.thelocal.dk/20150625/russia-rehearsed-takeover-o...
Remember, Ukrainians were literally "brothers"; if it happened to them, is any weak neighbor really safe?