Everyone has the right to make their own determinations about the moral quality of different choices. Just because you believe that his decision to work with SAP represents some kind of moral failure (I'd be fascinated to hear your reasoning) it doesn't preclude him from both disagreeing with you and at the same time taking a moral stance on another issue.

The factors at play in such choices are extremely complex for every individual, but we can't just say "Hey you hypocrite you work for a major multinational so you can never ever take a moral position on anything ever again". That's not sensible.

How does the fact that he works for SAP have any bearing on his moral stance regarding blockchain?

Ad hominem is a fallacious argument.

Sure you might not like SAP's business practices but there are very few large software companies in Europe.

Incredibly disrespectful for no reason