As non-US citizen this is also how I see it. Especially git's master seemed like such a weird change.

But on the other hand, main is shorter than master, and allowlist is self explanatory unlike whitelist, so personally I'm fine with these changes.

Whitelist is self-explanatory, and it means you have a term for grey list.

I also dislike American concerns getting special treatment and it comes with the background of the adoption of American English, which often loses meanings and distinctions.