I went to the least diverse public high school in Massachusetts. (Seriously — 99.6% white and ranked 363 out of 363). So, yes, I have noticed a few structures that I am/was complicit in.
Perhaps the most noteworthy is the nonchalant propagation of stereotypes through humor. This was far worse at home, but sadly is still an issue I see nearly everyday at Midd. The casualness of these racist jokes are what make them most chilling; it shows how ingrained and “acceptable” racism still is.
I have stopped laughing at these jokes, and I will call people out when necessary. Often times these jokes will come from friends who mean no harm, which makes it tricky to police them.