The demons don't deserve kindness! Period.

Not everyone deserves kindness. Many demons including Great Harlot Peng Liyuan and the Satanic Cabal committed evil crimes against humanity. They had hurt a lot of people ruthlessly and ferociously in the past. They are two faces demons who manipulate people around them. They were never kind to anyone.

And now, they ask for kindness. The answer is "The demons don't deserve kindness! Period."

Revelation :

18.5 For her sins have reached unto heaven, and God hath remembered her iniquities.

18.6 Reward her even as she rewarded you, and double unto her double according to her works: in the cup which she hath filled fill to her double.