Others have said it, but the quality of a person’s morals doesn’t have any direct correlation with their intelligence. Look at the majority of Congress. Most of them are intelligent people that are just the worst.
My advice is first to assess your risk tolerance to decide where your line is and then pushback. I’m a white male, so we’re not talking apples to apples, but I have long hair, I’ll talk openly about supporting lgbtq+, abortion, and really any topic, and worked in a manufacturing facility surrounded by bigots. If I was in a situation where someone says something bigoted, I’d call them out or give counter points depending on the topic. Some people are just ignorant and willing to have a conversation, but most get defensive. I’ve been taught that silence is complacency, so I’m not in the habit of letting bigots spew shit without pushback. Many of those workers I had an amicable work relationship with and a few others a little bit outside of work. In a work environment, you have to maintain a level of professionalism when discussing topics like these, but you can be stern. I personally don’t care if I piss off everyone that thinks that way, but I’m also not out there trying to get fired.
Maybe if you pushback they’ll get the hint and at least not say shit when you’re around. Make sure that if you’re making an argument, you have the knowledge to defend it. For example, you said black people on average make less, which I believe to be true, but you need to be able to cite statements like that from reputable sources.
Lastly, and this will probably be a little controversial, but there are two things I wanted to address in your examples. First, I grew up in small town Iowa and there were no black people in my highschool, and 3 adopted black children in my town. I don’t know the context of why that was brought up around you, but that isn’t inherently a racist thing, just a fact. I mention that sometimes when I’m trying to express to people how my experiences growing up may have been culturally different from people in more diverse areas. The other thing is that some people do have different tolerances for those micro aggressions. I have gay friends that will call me gay, women friends that will call me a bitch, and know of many other situations where groups of people just have a a comfortable relationship that they’re comfortable making those jokes amongst each other. If the Mexican guy that was teased was not in with the joke, then that’s a problem, but if they also thought the situation was funny, then that’s just it and not something that you should be offended about. Working retail, a guest once forgot a bag on the counter so I ran out after them. Coming up behind them near their car I yelled, “ma’am you forgot this”, and a guy turned around. Was embarrassed, but his wife thought it was hilarious, so we all just chuckled and walked it off. If later his wife was teasing him for looking like a girl, I wouldn’t consider her being bigoted or sexist or anything like that, just making a joke of the situation.
So take all that as you will. Stand up for yourself to the extent that you’re comfortable doing so. Don’t correlate a person’s intelligence with their morals. Try not to be offended of the small things if you can, because there’s not enough time in life to fret over other’s actions. Take pride in the times that your smarter than then and all the time that your better than them. Finally for some professional advice, learn from those that may be smarter than you instead of being upset that they are.
But also easier with deep fakes.