Replying to @blackbrook@mander.xyz
You are absolutely right if it’s the “thumbs up” gesture. I learned the European way, with the fingers curled but not closed and the thumb extended to the outside (right side for a right-hand gesture and left for left-hand) at about a 45-degree angle. This doesn’t really look like the offensive gesture from my perspective but I realize others may disagree. Thankfully, as far as I know, I have never offended anyone doing this.
