If her husband was simply being "made redundant" (i.e. laid off for business purposes) then you're right, it's inconsiderate to the employee to give less than 2 week's notice of such a change.
My point is, however, we can't know if that's what happened here.
Imagine for a second (and I'm NOT saying that's what happened here) her husband was terminated for sexual harassment. Should the company have given him 2 weeks?
The problem is we don't KNOW what happened, and for legal reasons Tesla won't respond (nor would any other company, probably).
A firing, layoff, termination -- without detailed, explicit evidence it's very hard to assign blame. This person has given us little detail so I think we should be cautious about how outsiders evaluate the outcome.
It's disappointing however to see this on the front page of HN as some sort of implicit acknowledgment that what Tesla did was wrong when we don't have a full, independent accounting of what happened.
Just put yourself in the shoes of a company or manager that's had to let someone go for legit reasons -- would you publicize them? We need more data but this tweetstorm doesn't really provide it, IMHO.