YOU SAID:

how dare they be kind to my uncle

INTO JAPANESE

彼らは私の叔父に親切にするなんて

BACK INTO ENGLISH

They're going to be kind to my uncle.

INTO JAPANESE

彼らは私の叔父に親切になるだろう。

BACK INTO ENGLISH

They are going to be kind to my uncle.

INTO JAPANESE

彼らは私の叔父に親切になるだろう。

BACK INTO ENGLISH

They are going to be kind to my uncle.