It’s basically the isle that could be labeled “packaged food for foodies”
Forced relocation? Mass killing? Both, and other things, so “cleansing”
Of who? Jews? Gypsies? Gays? Blacks? All of those, so not “religious” or “racial”. Instead, “ethnic”
Sadly, ethnic cleansing has happened repeatedly since (and before) then. It is the most precise, description that is not too narrow.
If we can’t name the crime, then how do we describe it or bring the guilty to justice?
“Ethnic Cleansing” is when you force the ethnic Germans out of Kaliningrad (née Königsberg) and replace them with ethnic Russians. Genocide is when you round up the undesirables and systematically murder them.
My sincere advice is go learn a thing or two before commenting on topics like this again.