Then you are likely living in an area where a lot of people are miserable.
The good news? Positivity spreads much better than negativity.
This means that while your environment may be making you miserable, you have the power to change your environment just by being who you are and remaining true to who you are.
Don’t let the grouches win their battle against the good stuff in life.
That said, if watching the death of people like George Floyd makes you miserable even before you begin to imagine how anyone related to him in any way must feel when they watch it as well as how he must have felt when he was being killed, then it’s just about you having a normal heart and soul. It’s okay to cry and/or to hug someone when you’re feeling shitty over that.
It would have been an atrocity too if it had happened to a white-skinned person, but the sad fact is that this kind of thing is done to people who don’t have a white skin much more frequently in some societies.
Similar things are also done too often to other people who are a little bit different from the “standard white male” in other respects, such as men who are deaf or autistic.