All the Christians I know would never use such speech against non-believers, its not in our persona.
But that's just it they do.. look at all the threads of the 'saved' in here.. they start by declaring they are chosen and special and that you can be too, then as they get questioned they simply write off your entire life and label the questioners with a psudo-polite dismissive 'not spiritual enough' or that you have 'not prayed enough' or not been 'sincere enough' or that you have not 'opened their hearts enough' followed by a weak and often insulting retreat.
I call that completely powerless, cowardly and insincere. Not what I would expect of someone who has truly found God and has a relationship with him. They are here to simply flaunt what they do not really have.