The missing vital information is this:  
IBM Berlin would not have been cut off until the U.S. entered the war. The war broke out years before, and the human rights abuses began years before that. IBM absolutely knew what was up for years by the time the U.S. manipulated Hitler into declaring war on us after Pearl Harbor (That&#x27;s a whole story in itself involving a Nazi spy who was serving in the U.S. Congress).  They were worse than Nazi collaborators; they didn&#x27;t have to worry about being shot if they didn&#x27;t do what they were told. The news reports about the holocaust were largely discounted; even Jews didn&#x27;t believe them, but IBM had access to inside information and would have known why Hitler was so obsessed with census data.  They had to know that the news reports were true.
Not to say that the plight of the various groups the final solution was applied to would have been significantly different if IBM hadn&#x27;t been involved.