Because google employees hold extremely comfortable jobs, meaning they have more time for activism. There is a massive entitlement culture within the company.

For many years, Google leadership fostered a particularly open culture with vigorous internal debate and discussion. They held weekly all-hands Q&A sessions with Larry and Sergey, built an internal tool for sharing company-related image memes (including those critical of leadership), and hosted high-traffic internal mailing lists on a wide range of political and non-work related subjects.

Some of this has been curtailed in recent years, as leaks to the press increased and activist employees became increasingly critical of management.

I hear about stuff like this from Facebook pretty often, and to some extent from Amazon and Microsoft.

Apple might be different because they’re mostly just making devices? The social implications are less obvious.

Because Google attracted a lot of employees who care about corporate ethics with its "don't be evil" reputation. That reputation has faded as people learned about cases when Google didn't live up to it [1] but there are still a _lot_ of Googlers who want to hold Google to the old standard.

If there were another large tech company with a reputation for great ethics, many of these people would probably go there instead. But in spite of a lot of disillusionment, Google still seems to be the best of the FAANGs IMHO.

Full disclosure: I just left Google. I'm taking a break before looking for something new, but if someone knows of a tech company that is as ethical as I once thought Google was, I'd love to hear it...

[1] The wage-fixing cartel, several exec sexual harassment complaints and Andy Rubin's $90 million severance, double-speak around Project Maven, the complaints behind the walkout and ultimately Google firing the walkout organizers, etc.

I don't know about Apple but Amazon has Amazon Workers for Climate Justice which is a similar group.