The sole reason Germany annexed Czechoslovakia was was that there were atrocities being committed against the Sudeten[0].
He even made a speech at the Sportpalast in Berlin in which he stated that the Sudetenland was "the last territorial demand I have to make in Europe". So all's fine, and we don't have to worry about Germany.
One big difference, is that the opposition to nazi Germany was relatively weak before the start of WW2:
After Reginald Drax's mission to Moscow failed, the Soviet Union ended up signing its famous non-aggression pact.
Italy was allied, Spain was neutral/aligned. Turkiye was neutral.
Poland could only count on UK and France[0].
Compare to now, where the NATO military bloc is massive. No one would dare risking a military confrontation in these circumstances.
If anything, when there are any tensions between two non-NATO countries, it makes it more urgent for one to oppose the other joining NATO (attacking before they'd join NATO would stave off them joining, attacking after they'd join NATO would lead to an unwinnable fight).
The article you cite says nothing about the /alleged/ [by Hitler as a pretext for annexation] atrocities against Sudeten Germans. The expulsion of Germans from Czechoslovakia _after_ World War II was an ugly chapter, but really -- there were no 'atrocities' being committed against that population /before/ the war. See also https://en.wikipedia.org/wiki/Sudeten_German_uprising
Sorry if it wasn't obvious, my reply was meant as an analogy. The parent comment said "The sole reason Russia invaded Ukraine was that it was flirting too much with NATO."
So I wanted to show that people have also used cheap excuses like this in the past, and that we shouldn't give Russian propaganda the benefit of the doubt.
Of course there weren't any atrocities commited against the Sudetendeutsche population, I just assumed everyone knew that, but that's due to my German-centric view of history.
I should have expected this, as sarcasm doesn't translate well over text, especially if people don't share the same cultural background.
He even made a speech at the Sportpalast in Berlin in which he stated that the Sudetenland was "the last territorial demand I have to make in Europe". So all's fine, and we don't have to worry about Germany.
0: https://en.m.wikipedia.org/wiki/Lesson_of_Munich