This is a perfect example of an ad hominem argument. No attempt to refute the evidence, just a reference to writer's (alleged) political beliefs.

This approach is common on Reddit, but I'm sad to see this type of argument on HN. Can we please do better than "this argument is wrong because of the writer's politics"? I'd hate to see that kind of argument become commonplace here.

Thank you for pointing this out. I typed out a reply earlier to this effect, but deleted it. Fighting the same fight on Twitter.