YOU SAID:

I think that you are an idiot because you are not smart.

INTO JAPANESE

あなたは頭が良くないのでばかだと思います。

BACK INTO ENGLISH

I think you're stupid because you're not smart.

INTO JAPANESE

あなたは頭が良くないのであなたは愚かだと思います。

BACK INTO ENGLISH

I think you're stupid because you're not smart.