Here i enumerate some sarcastic words uttered by Jesus himself in the New Testament.

1. Hypocrites!
2. Blind leader of the blinds
3. Brood of vipers!
4.woe to you !
5. Foolish Ones! (luke 11: 40)
6. This is an evil generation,it seeks sign,..no sign will be given to it...
7. O faithless and perverse generation,how long should i be and bear with you?
8. Let these words sink down into your ears...
...etc....etc..

What is this implication to some who honor Jesus to be benevolent on all its ways? For some are just sensitive that if you become sarcastic or utter sarcastic words they label you to be hard heartened person.