YOU SAID:
americans think they are superior to everyone, even themselves
INTO JAPANESE
アメリカ人は自分たちが誰よりも優れていると思っています
BACK INTO ENGLISH
Americans think they are better than anyone else
INTO JAPANESE
アメリカ人は彼らが他の誰よりも優れていると思います
BACK INTO ENGLISH
Americans think they are better than anyone else
You've done this before, haven't you.