YOU SAID:
oh no, u stupid because u stupid
INTO JAPANESE
ああいや、u の愚かなので u の愚かな
BACK INTO ENGLISH
Oh no, you stupid because u stupid
INTO JAPANESE
ああいや、あなた愚かなので u の愚かな
BACK INTO ENGLISH
Oh no, you stupid because u stupid
Come on, you can do better than that.