Something I don’t understand

One thing I will never get is how any type of hate really. It doesn’t matter what it is or wherever but there is always going to be someone that has only negative things to say. it literally doesn’t hurt you or cost you in any way to not say anything about it. It could be clothes, an idea, a car, etc… and it could be brand new, and there will always be some saying something about it. I do understand that people will never have the same things or that some people won’t agree on some stuff but that’s no reason to say something bad about it. For example, I have seen a video where a guy is literally just holding up a sign with a few words, he is literally just holding the sign and people are constantly just attacking him with words and slurs . Some are even driving and they just pull up on the side of the road to tell him something. It’s crazy to me how something so small can bother someone so much to the point where they take time out of their day just to focus on that. I will never understand how someone can get a good feeling out of just constantly taking bad on something.