Imagine there was a group of people in your school, in your workplace, in your city who for some reason feel that Kazakhspy should not exist. They’re not allowed to kill you, that’s against the law, but they would if they could. Instead, they say fuck Kazakhspy, go kill yourself Kazakhspy, I can’t stand you Kazakhspy. Hearing that kind of thing on a regular basis might be a little hurtful. Now imagine some game studio heard about this and thought hey, let’s include Kazakhspy in our game. And then that group in your community was like “what the fuck is this! I hate Kazakhspy and now they’re shoving Kazakhspy down my throat in a videogame? I will not stand for this.” And goes through the effort of making a mod to remove you from the game and puts it on the website. You hear about this and see that it’s up there with a few downloads. You might be a little hurt to know some people hate you so much they’ll mod a game to spite you just because they don’t like your existence. Then the website owner is like, “Wow, this is weirdly hateful and doesn’t belong on my website. Let’s not perpetuate hate against Kazakhspy.”
That’s why. In context it’s hurtful to people because the intention of creating it was to hurt people through hate.