A group of people...in a clearly defined structure. In Google's case that structure is a hierarchy. The issue passed through this structure and a decision was made. Now even hierarchical companies often have some mechanism to make appeals based on ethics, safety, etc. but either this wasn't done or their appeals were rejected.
> After all it was decided to pursue by some execs, and it is jot that hard to withdrawfrom it
Mr Pichai was probably at the very least aware of a billion dollar contract I would guess. If they wanted to withdraw from it, they would have done so.
> It is not the core business of Google.
I think Google would like very much to succeed in the cloud. A billion dollar cloud contract will certainly help with that.