How is it childish?

Somebody wants to come out of nowhere and attempt insulting me, I'll put them in their place. They're too illiterate to understand a regular sentence, so I lowered myself to terms they would understand.

You on the other hand, you're just a fucking loser, that's all that has to be said.

Go take some pictures of that Asian woman's car and front like it's cool dude, it's not.