From the description of what he personally did when employed, he didn’t steer a single Jew into a single oven. I’m sure he may have felt shame that he risked being put into a position to do that, but at the same time why not relief that by the grace of God it did not happen? I say this case verges on witch hunt, and so did any prior parallel cases.
There does appear to be some risk of becoming what you believe yourself to be eradicating, looking back through the centuries.