It's not quite what it appears. IBM, before the war, was a leader in IT for national censuses. They marketed aggresively to the German and Austrian governments among others. That technology was used in the Holocaust. The technology was supported by IBM Germany during the war but by then Armonk had no contact or control over IBM Germany.

I'm no fan of IBM. I usedf to work for them and hated it. But let's look at a modern parallel. Let's say Microsoft sold SQL Server to the government of Israel which then used that software to track Palestinians it wanted to rub out would you really say that Microsoft was responsible?