Historicaly the nazis were very popular in Ukraine [...] They were seen as heroes and liberators by a lot of people.
That is a blatant exaggeration bordering on revisionism. They were seen as liberators by a minority upon invasion in 1941, that quickly changed once the people realized the facts of the occupation, and millions fought against the nazis.
This person is not wrong. I'm sadly incapable of breaking the cycle, but for the short periods that I do, my depression is greatly alleviated. Abandoning reddit was probably had the most positive impact on my mental health of anything I've done in years.