The TL-191 US is willing to commit ethnic cleansing with a white population if its small enough to move without causing a massive body count and there is a decent place to move them to but if it involves genocide or a relocation to an area that is unsuitable to human existence and kills off lots of people as a consequence its not willing to do that.
Evidence? And ethnic cleansing through forced migration ALWAYS involves a body count.
The US spent the first century and a half or so of its existence being perfectly willing to ethnically cleanse tens to hundreds of thousands of people for its own benefit. The Confederates being white is irrelevant, as they are a cultural and social minority that is considered an untrustworthy, untrustable, insidious enemy bent on the destruction of the US and Americans, based on the warmongering actions of the Featherston regime in response to an unprecedented, unparalleled, and incredible degree of US mercy in the first Great War.
I understand perfectly well why the division of Germany was necessary because of the politics of the Cold War.I also think that division played a role in the deNazification being mostly effective partially because it was a consequence of the Nazi defeat .For most surviving Germans it was one of the few tangible effects of the Nazi defeat they saw in their every day lives. If Germany had remained whole without lots of American or Soviet influence that would not have happened as effectively and perhaps not at all.
I can't think how you could possibly think that the division of Germany helped people
oppose the Nazis. If anything, it contributed to further pro-Nazi sentiment, especially considering how the idea of enemy powers wanting to divide Germany and leave it weak and powerless was a key element of Nazi propaganda from quite early on.