With kindness

Someone once told me "kill them with kindness". It might work in the long run, but if one wants to make it fast, one has to make it rough, and the simultaneously blunt and sharp nature of rudeness makes it the ideal candidate for such job. Of course, rudeness require a considerable degree of brilliance, cynicism and even a touch of sarcasm. Without these attributes, one cannot even pretend to be rude, but to be nothing but mean.