For arguing that the Holocaust is also (not rather) accountable by traditions of violent expansionism ("redemptive imperialism") in some recent publications, German reviewers went crazy. Now that their "arguments" are appearing in English, people are noticing, and that's good.
"The fact that the Holocaust can’t be explained by theories of imperialism" is an absolutely insane thing for anyone, especially a German, to suggest. Lebensraum was the justification for basically everything the Nazis did, including the Holocaust