Maybe i misunderstand the downvote mechanism on HN. IMO it should be used for inconsiderate, rude, spam etc. but not against an opinion you disagree with.
Everytime I post something against nuclear it gets a huge amount of downvotes. In this case it didn't happen to me, but happens to another user, see comments at the bottom of the tree.
I would say just don't upvote, or better write an argument why you disagree.
Otherwise leads to huge amount of group think because opposing ideas are pushed down instead of debated.