jesus said, god already kind to the people who are unthankful and to the bad people, and also you must merciful.

But to you who hear me, I say to you: love your enemies, do good to those who hate you, bless those who curse you, pray for those who revile you. who slap you one cheek, give also to him the other cheek, and anyone who takes your cloak, let she take your shirt also. Give to everyone who ask to you: and do not asked back to the person who took from you. and as you want that men do unto you, also do it to them. and if you love them which love you, what special grace is that? for even sinners love those who love them. for if you do good to those who do good to you, what special grace is that? even sinners do that. and if you lend something to someone, because you hope to receive something from him, what special grace is that? even sinners lend to sinners, for they may receive back as much. and you must love your enemies and do good to them and lend without expecting anything in return, then your reward will be great and you will become sons of the supreme god, because he is kind to the people who are unthankful and god kind to the bad people. and you must merciful, be same like your father is merciful."