There's a faction of HN commenters who are somewhat reflexively anti-American, anti-capitalist, or both. In my experience they're also censorious by nature, and like to downvote and even flag comments which are perfectly polite, and simply express opinions they don't agree with. I consider the latter specifically to be very bad form, I vouch for comments which fit that profile almost daily now.
This has been exacerbated by the recent election, which has, understandably, upset people.
I personally try not to do this too much (unless something is egregiously, probably wrong), but it's a thing that I think we should just accept as a norm.
Dang has said that downvoting for disagreement is allowed. Whether this is a good practice or not is probably a personal opinion. I don’t know how you would even correct for this if you wanted to. If someone is making normative statements especially, and you disagree, a downvote seems entirely appropriate?
There's a difference between downvoting something substantively wrong, fatuous and/or cantankerous, bad faith, and so on, and simply doing so to punish the sort of person one doesn't like for speaking their mind. That difference is subjective, but I know it when I see it. There's no need to police this, or any way to really, but I think rather poorly of such behavior and would be gratified if they would knock it off.
As an example, I'm fine downvoting an opinion that I find morally gross or anti-social, even though others (such as the person commenting) might think it's fine, and even agree with it.
https://slatestarcodex.com/2018/10/30/sort-by-controversial/
I didn’t mention flagging, which I reserve for guidelines violations.
Is it that they don't agree that "the New World [...is...] much more welcoming [...of...] all sorts of productive folk"?