The parent comment can only be read as assigning blame if you think that ISO rejecting the NSA's proposal is a bad thing. I'd say it's a good thing since we know that the NSA's proposals are sometimes backdoored.
Irrespective of the proposal being backdoored, it was clear that the NSA refused to follow standard procedure by providing the necessary supporting materials for their proposal, so it's not difficult to see why the ISO rejected the proposal.
Your rush to judgement here is unwarranted. OP said nothing about whether what Snowden did was good or bad, just that it was a factor in the ISO's decision.
Snowden helped bring those behaviors to light by being someone people could 'relate' to. Thus, calling attention to past, present, and future actions by certain agencies.