Well, we don't really know all of the facts but it apparently wasn't a problem when she was hired, wasn't a problem when they highlighted her for Lady Ada Lovelace day, and it wasn't a problem that kept FSF from giving her a senior job title. FSF obviously isn't going to comment on the matter but Leah Rowe at one point claimed on the libreboot website that the employee that was let go had said that it was fine for Leah to raise cain over it but that was reverted not long after it was put up. Leah also claimed to be taking the high ground to avoid naming names and then promptly turned around and claimed that three individuals at FSF were misogynistic and that they should be fired immediately.
I don't have enough data to make anything but FUD from it.
There are many reasons that someone could change their mind and decide to take different actions than they have before. Either way it is clear that some form of 'bad blood' has arisen and that things are now divisive. Unfortunately I don't know who I can side with on this issue due to the lack of data.
In my mind, I really don't even see any reason to believe that there is significant bad blood between the actual employee that was fired and FSF. The only side of this story that we have is Leah's and she's already outed the ex-employee, slandered 3 people in every way she can, and either the fired employee changed her mind about supporting Leah's actions, or Leah made that up as well.
At the very least, I think we can conclude that the FSF and the fired employee are unhappy with Leah's actions.
Make from that what you will.