YOU SAID:
why did you do something so horrible to me?
INTO JAPANESE
なんでこんなに恐ろしいことをしたの?
BACK INTO ENGLISH
Why did you do this horrible thing?
INTO JAPANESE
なぜこの恐ろしいことをしたのですか?
BACK INTO ENGLISH
Why did you do this horrible thing?
That didn't even make that much sense in English.