> a 2008 donation of $1,000 to California Proposition 8

The woke/cancel culture crowd (none of whom knew him personally) went after him with a vengeance in 2014, but there were LGBT and LGBT-allied co-workers of his at the time who were aghast at the outrage. Here are three examples I could find online just now [0][1][2]

[0] https://subfictional.com/on-brendan-eich-as-ceo-of-mozilla/

[1] https://web.archive.org/web/20150202162458/http://words.tofu...

[2] https://medium.com/@__davidflanagan/for-the-record-7645a4bf8...

None of the three authors you are citing here knew him personally, either, and none of them seem to be particularly 'aghast'.