I lookled into this as time allowed, and I'm missing something from your point. I thought Operation Keelhaul was to forcibly send millions of refugees of communism back to their communist countries. The deaths were a result of their treatment under Stalin when they got back.
Strange how no one wants to talk about that, though the carnage was equivalent to Hiroshima.
From what I read, it was several times the number killed at both Hiroshima and Nagasaki.
I guess the visual isn't there.
I think the difference is that, instead of killing them outright, we returned them to Stalin. Of course, sending someone who escaped Stalin back to him was about the same as putting that same refugee in front of a firing squad, but I guess the attitude was "we didn't kill them, Stalin did."
They also sent back some soldiers from countries like Poland and Czechoslovakia who had escaped the Nazis and fought with the allies.