First, it's not a "diversity focused company" it's a company focused on building a Free and Open internet. Being socially inclusive in their internal culture is secondary. Moreover Eich's definition of inclusivity was perfectly in line with Mozilla's which is that not only are sexual orientations protected but so are religious views as long as the person interacts constructively with the community. He had his personal religious views and by all accounts he didn't let them prevent him from interacting constructively with the Mozilla community.
> "...and Mozilla would suffer due to the volume of people who stated they would not work for or with someone who did what he did."
It was less than 10 employees who asked him to step down, none of them were his direct reports, how many threatened to leave?
There's absolutely no reason that he should be forced to apologize for his donation. I don't agree with the donation but I'm an American and I think it's extremely dangerous to go down the road of persecuting others for taking part in political campaigns, etc.
I agree with you that Eich's actions are to a large extent known, so I again challenge you to provide me with a single shred of evidence that in his 16 years at Mozilla Eich treated even one member of the LGBT community unfairly from his position of power.