…I personally find that very hard to believe. Maybe you weren't specifically "rude" here, but you were clearly unpleasant–you called their claims "false" and "nonsense" repeatedly, which is rarely if ever necessary.
Calling false claims "false" is necessary and not rude.
And I just added Highwayhash now to smhasher by myself and my initial analysis was confirmed. It's the 2nd slowest of all tested good hashes, only behind Siphash. Every other is simplier and faster.
Chi-Square on the lower 32bits was 0.00 so it's really a good one. But I see no usecase for it, really.
But they still didn't put their hash to external scrutinity, still waiting for the pull request to get it tested with smhasher.