It's a super hot topic that gets discussed a ton, probably more than any other in the last year. There are plenty of other threads about this theme and will be plenty more. Obviously it isn't being suppressed.

What does get penalized on HN are (a) dupes and (b) copycat or follow-up posts trying to hog in on their slice of the click-pie. That's a site quality issue that has nothing to with political sides.