I read the article, the guy is a complete cretin.
I remember this guy, I've read an interview with him:
krytykapolityczna.pl/kraj/sierakowski-nie-jestesmy-lepsi-od-ukraincow/
I may not agree with everything he says, but I wouldn't call him a "cretin" though - he makes more sense in Polish, imho.
This was of course on another level, as you pointed out:
Nijakowski writes (...)
This kind of acrobatics I don't think I've witnessed before.
You've taken this out of context. He was explaining the difference between genocide and ethnic cleansing:
linkedin.com/pulse/difference-between-genocide-ethnic-cleansing-kagusthan-ariaratnam
"In other words, ethnic cleansing chooses to
terrify a particular ethnic group,
forcing them to leave a particular area in order to create a more homogenous population"
While genocide focuses on complete or partial extermination of a group of people. That's why the Holocaust is considered to be a genocide, while what Serbs did in Yugoslavia, for example, is considered to be an ethnic cleansing, as far as I understand.
He is trying to make into politicks in Poland for over 20 years
That's the first I hear of it. Where did you get that?