I think the Hacker News crowd is just a little baffled because there are some conflicting emotions on display from Dr. T here. Conflicting emotions are a very human thing to have, and are guaranteed to confuse the engineer crowd.
1. He's glad Minix is useful to others
2. He's slightly hurt that Intel repeatedly asked him for help (which he provided) but never bothered to thank him or even let him know the purpose of their inquiries. ("That certainly wasn't required in any way, but I think it would have been polite to give me a heads up, that's all.")
3. He admits that his choice of license permits this behavior, so he (slightly grudgingly) accepts their choice ("If nothing else, this bit of news reaffirms my view that the Berkeley license provides the maximum amount of freedom to potential users")