No need to swallow it

"Cross ove the bridge. There's a lot of love on the streets." said by a teenager at CityKids ( pg 337, paragraph 35 in the Don't just stand there.) I like this sentense very muchand, I think it is good for some inflexible people as well. In my comprehension, this sentense means do not persist in your own opinion, when you give it up and step across the line you set for yourself, the situation will be a lot better. This is hard for adults, I am very impressive to real it which is spoken by a teenager.
In the essay, some people are too timid to speak out their opinion when they hear something offensive. They are afraid that if they speak out, it might bring some bad results or embarrasements to them; hence, they swallw slurs even though it makes them uncomfortable. But in fact that nothing bad is going to cause when you speak out, they will know the way they are acting offers other people a feeling of humiliation. To feel how others feel is the best way to make a joke or treat other people.