We are made out of meat. We're half-evolved chimps living in a world with a 10,000-year history of war. We start life naked, screaming, and covered in blood, knowing so little that it takes years just to learn how to eat food. At the end, we all die, and then our bodies rot.
It's a ridiculous world, and it's nobody's fault. But somebody has to take responsibility for making it better. I'm going to try. You can help if you want.
I think the expectation of a moral adult is to seek mutual understanding to continually improve yourself to be a positive and constructive element in others' lives.
If you unintentionally offended someone, it's an opportunity to learn more about their world.
Conversely, it's also an opportunity for them to learn about your world. Maybe not everyone they meet is that total asshole, and there are in fact good people in this world. Just be that good person.