It's saying that Atticus is a respectable person who doesn't see race as a reason to or to not defend someone; he's not racist. It shows that racism in the south is common, and that because of that, Scout has grown up being taught to be racist. Atticus is trying to turn her away from that and get her to focus on the person's true self, not the color of their skin.
You can't aware the question without the text. I'll look up the story though for sure
I would choose to argue that social media is bad for teens and children. there’s more you can support this with, such as cyber bullying, safety risks, hackers, etc.