To "make the case that they" are or aren't violating antitrust law, you need to know and talk about antitrust law.

To not be sure how someone can make either case, without being familiar with antitrust law and framing the discussion in terms of it, is only to be expected.

I came to HN hoping to see some legal analysis, but I guess that's not what HN is for. You can get good technical discussion of technology, but when it comes to legal technical stuff it's just ideology and people talking about how they think things should be. What's HN for lawyers?