In this case it sounds like the NSA has several assumptions:
A. That Trump winning was worse than Clinton
B. That what Russian state-actors do is somehow more "bad" than what American state-actors do
C. That the people of America should be prevented from knowing certain things that "us smarter people in power" can handle, so that they vote for the person "We know is best."
C is pretty scary when you think about it. And I for one, certainly don't trust the militaristically-minded never-tried-marijuana lets-do-polygraph tap-everything-and-ask-questions-later people at our acronym agencies to be more objective judges of long-term good than the average citizen.
Let's (humans) work on stopping asteroids and climate change rather than fight over lines on maps.