What's problematic is when there's two throwaway accounts created at the same time, replying to one another in agreement, using the same writing style, and advancing same the narrative that's worded as if it's straight out of a public relations office.
HN has seen at least one NSA employee and one American intelligence community member posting in the wake of Snowden, and both were overwhelmingly treated with respect by the community despite their views. I myself often express views here that are staunchly anti-Snowden in nature.
The throwaway accounts you're defending received such hostility because they were perceived as being insincere due to their suspicious posting behavior. It was not due to their views or opinions.