YOU SAID:

You stupid moron. Why did you do that?

INTO JAPANESE

あなたは馬鹿だ。どうしてそんなことをしました？

BACK INTO ENGLISH

You are a fool. Why did you do such a thing?

INTO JAPANESE

あなたはバカです。なぜあなたはそのようなことをしましたか？

BACK INTO ENGLISH

You are a fool. Why did you do such a thing?