The concepts of racism was quite different then as to now and was addressed. Basically the story of the 'Good Samaritan" needed to add the ‘good’ because Samaritans were discriminated against and though of as poorly as racists do today.
Homophobia is basically covered in a bunch of places where in general you are supposed to love and treat people well. Jesus gave MANY examples of directly treating people who were not in good social, or religious, graces with kindness,openness and compassion. Basically the worse someone is the more you have to try and show love. I’m not sure at all how basically the complete opposite is the practice. There is some epic level mental gymnastics to get there.
Now slavery, umm… yeah. God was like , here are some rules on how to treat your slaves. You know because that is a thing and should keep being one. I’m glad this one is opposite in practice.