I've been following this on twitter, too, and I'm torn, but I generally feel very bad for her.
First, I thought the gender harassment she experienced would be more than being called "defensive" (I had not context for this until this article... I don't think she's elaborated about it on twitter). This is a complaint I've heard levied against men and women, though perhaps women experience it more. Nonetheless, that in itself probably does not constitute harassment from a legal perspective, as mentioned by others.
In terms of the p-hacking that is alleged, I thought from her own twitter account that it was something more malicious. It sounds like we are talking about a Spearman rho or analysis that is measuring a simple relationship between orientation on a Likert scale (not the best method in general for complex things like sexual orientation) and harassment. Depending on what was actually wound up publishing, I do not think it is unethical to say "the scale, originally as written listed 1 as heterosexual, 5 as homosexual, and the rest as bisexual. When we ran a model like this, nothing was significant. However, when running the model such that 1/2 were heterosexual/bisexual leaning heterosexual, 3 as truly bisexual, and 4/5 as homosexual or bisexual leaning homosexual, results were significant." If it's not stated exactly like that, then in my opinion she is correct in that the professor is doing a post-hoc manipulation of the scale and committing research fraud. It sounds like from his email, though, that the professor basically did what I said regarding testing for changing in the way the scale was used, but reporting both. We can debate this post-hoc change, but it's par for the course, especially in social psych.
I think Clark is at fault if they did not follow the process of first putting her on probation, but instead unilaterally dismissing her from the program after 30 days (+21 additional days); the length of review, however, seemed thorough. Furthermore, disagreeing with someone about their approach to a statistical analysis, especially if it is blatantly wrong, should not warrant in dismissal, and her whistleblowing needs to be protected. This is honestly such a mess, and there are factors I am sure she is not tweeting about or in this article that are at place (e.g., the entire side of her mentor). I am also surprised nobody else would take her on as a mentee...... it sounds like the Clark psych department and the whole university is really circling their wagons here.
This is just such a mess... as a grad student right now, I am particularly sensitive to the power misbalance at play here. 🙁