I think this wasn't so fully dominated by SJW and communists two or three years ago as it is now.
Downvotes were not so commonly used as censuring mechanisms for contrary political opinions also.
What we're talking about here is a perfectly ordinary application of antitrust law, which has been a well-supported framework of law for over a century. This is not some radical new idea proposed by a fringe group.
And while it is off-topic, HN "dominated by SJWs"? Good grief, you cannot be serious. Just to give one example, the HN commenters overwhelmingly supported James Damore and thought Google was in the wrong for firing him. Regardless of the merits of that opinion, it is not what you would see in a community "dominated by SJWs".
It is pretty clear in the HN guidelines that downvotes shouldn't be used to punish people you disagree with, but I see an army of politicized people doing it consistently, so it makes sense to identify these people with what I personally think from certain political groups. The discussion could continue from that point, with other people disagreeing with me and saying that the downvotes had a reasonable motive or whatever.