I strongly disagree with it, but it's been stated a few times that it's ok to use downvote if you disagree (1). This is certainly not a new thing around here...
A reply giving the reason you disagree has the benefit of preserving both sides of the argument.
How was national security endangered? And I'm curious which of the two parties you think the "partisan" downvoters represent?
HN is over. I'm sorry to see your reasonable response treated that way but if you've been following the past few months you'd know this is now more of an echo chamber than ever. Groupthink rules the day. But anyone who would care seems to have left by now.