I doubt this comment alone got her fired. People like that are toxic to work with
Good point, but I think the company could have handled this in a better way. To start with, by outright firing her, they've given her more of the attention she wants. It's a weaponized Streisand effect, and people like her have learned how to use it to their advantage.
I would suggest, in the future, to make her recant her statements publicly, start giving negative performance reviews, then finally firing her for failing to meet performance expectations.
Most companies have this down to a science. They should have multiple levels of managers above her. She would be called in to long meetings with each one of them to discuss the issue she created. Some good cop/bad cop action. Some "Why aren't you done with your project that's due yet?" knowing full well its because she's been stuck in meetings about her little tantrum. Wearing her down psychologically until she publicly retracts her statements. Once she retracts fully, all her little followers will be deflated and the people she offended will feel a small measure of triumph.
I think this game company should look into hiring some professional management drones. The company seem really unprepared to handle her outburst properly.