It doesn't matter if it's speculation or not. The DDOS attack is disgusting and the instigators of the attack should be ashamed of themselves.
It doesn't matter if it's speculation or not. Anyone that boycotts a company because an employee used her bully pulpit to call out someone's misogyny is an asshole. Any company that reacts to that loss of business is also a company full of assholes.
It doesn't matter if it's speculation or not. The DDOS DID happen and anyone that says that it didn't influence their poor decision, is very confused about the world.
It doesn't matter if it's speculation or not. Everyone has lost in this situation. The original dickhead that didn't have enough sense to keep his misogyny out of ear shot which cost him his job, the company that fired him because they didn't want the exposure of keeping a sexist who was caught red handed being a sexist, the woman who has had to put up with some of the worst trolls on the web because she called out someone making sexist jokes, and the company that felt that they had to fire her because of the exposure of keeping her on the payroll AND because of the vicious disgusting amoral assholes that have attacked that companies servers.
Frankly. Frankly it doesn't matter. This situation sucks and the trolls are behind the steering wheel nearly every step of the way.