Basically it's complex science but it depends on the type of genetics. Sometimes we can't figure out why we have different skin colors.
Basically you have a racist statement.
Your probably a 7 year old. Your parents should think about this "about you cussing on the internet" I mean sometimes kids can't help saying bad words But Your parents probably taught you not to swear to others Even if they are making porn of you, The only way to stop them is to ignore them.
Besides many kids repeat what adult's say and say it in the internet. You should know that your words are literally racist or offensive in other cultures.
Sometimes people just want attention and wanted to harm others because they're are going through a hard time so they seek out for others attention hoping they are the best.