Thank you for the mention (and sorry it took this long to respond to this piece. I read it but wanted to leave a detailed response but forgot).
You made a lot of valid point and most of it resonate with me. The thing about culture and having to learn from other cultures, very valid. Every society is unique and people interact and experience life differently and we have this amazing technology called the internet that allows us access and interact with people like we have never before. It has cleared some misconceptions about certain groups and race.
Also, I will say in regards to in-groups, there are alot of factors that contribute to people coming together and bonding and one of those things is race/ethnicity/nationality. For instance, if I am in a new country I am most likely going to bond with people who look like me, who at least have some similarities with me. And with that comes some form of consciousness or approach to other groups. For instance, I have been had discussions with people who feel like strangers here even after investing so much of their time, mainly because they don't look a certain type of way.
Nevertheless hive in its way exposes us to a bigger community and diverse cultures, which is a huge opportunity to learn. Although many of us still have our bias towards certain groups, which is going to take more than a few posts to unlearn, I will say this is a safer space for many (like myself)
P.s pardon any typos