YOU SAID:
why are you so dumb if you dont know what you are doing
INTO JAPANESE
自分が何をしているのかわからないのに、なぜそんなに馬鹿なのですか
BACK INTO ENGLISH
Why are you so stupid when you don't know what you're doing?
INTO JAPANESE
何をしているのかわからないのに、どうしてそんなにバカなの?
BACK INTO ENGLISH
Why are you so stupid when you don't know what you're doing?
You've done this before, haven't you.