In both cases they have/had incomplete information but I'm pretty sure they know what is/was going on more or less

Well, low-level Nazis often said they didn't know the scope. The question is whether that is plausible given your position.

Engineers at Facebook don't think they're slurping up BIG data?

You make it seem so unknown or abstract for engineers today, claiming that Nazis knew the "scope" with no evidence, as if engineers knew the millions they were killing.

There is a ongoing more or less "AI" automated alleged genocide.

There is no "we didn't realize the scope" excuse to be made. The engineers at the spyware vendors know their employers hand over data.