I don't think it's the same thing here at all. Look at the item you posted -- there's a lot of agreement and disagreement going on, and both affirmative and negative viewpoints have good scores. The discussion is relatively civil and sensible. It's not that someone occasionally posts that kind of article, it's that all those articulately and civilly offering opposing viewpoints are considered enemies instead of enrichers, as they should be and at least relatively often are here on HN.

Also, I think on HN a story called "Socialism saved the miners" could have been front-paged and had a similar discussion. On reddit, if you post something that doesn't fit with their preconceptions against religion, capitalism, etc., all you can hope for is < -100 karma.