Genuine question

Genuine question, why are people racist or homophobic? I really don't get it. I know some people point to "statistics," but I don't think race or ethnicity determines whether someone's a good person, a bad person is just a bad person, regardless of background.

Is it some kind of moral-superiority complex? There's a saying that fits, "a society of sinners judging others for sinning differently." So genuinely, what do people even get out of being racist or homophobic?

When I see someone of a different color walking down the street, I don't think "ew, they're this or that." I really don't get it, and honestly I'm kind of confused. I have a hard time understanding things and emotions sometimes, but genuinely, what's wrong with having a different skin tone, or being LGBTQ?

I know certain skin colors are treated as a beauty standard in certain countries, and I've heard some people are racist because certain ethnicities or races don't fit those standards. But I think beauty standards are idealistic and nonsensical, I genuinely believe everyone is beautiful in their own way. I think people care too much about what others think. The only way to truly know whether you're attractive is by forming your own perception of yourself. If you think you're ugly, you're ugly. If you think you're beautiful, you're beautiful. Nobody can deem someone else attractive or unattractive, because beauty is subjective, everyone has different views and opinions. But still, I really don't get it, what's wrong with being a different ethnicity or sexuality? What’s your opinions and thoughts on this.