I feel 100% like the OP, it's exactly what I feel, and think, and always thought. Every word.
I only feel despise people when I see charity or people being "kind" to others (whereas it's generally only pity or guiltiness, which is the worse thing, because people are only "kind" to liberate themselves from this feeling and wants to feel better).
Seing people being hypocrite makes me angry, and I can be very provocative, getting them into a corner, to get this hypocrisy public and force people to admit to themselves (or to me ^^) they aren't so kind as they think they are.
Seeking and revealing the truth to show how people are corrupted. And, sometimes, trying to find some real people.
On the other hand, and unlike some INTP I know, I am always optimistic about finding people who are not this way, even among people who seems very conformist. I don't prejudge. Or, at least, i do, but it's only one input among others !
I consider that, when you are above pity and guiltiness or, at least, that you feel and accept the fact that they are inputs from your brain, like any other, the "true" generosity can exist.
Can you tell that one is generous if he can't be otherway ?
So, yes, I feel like I'm not so "cold, unfeeling cynical bastards", but more a dark (yet charming) romantic in love with the search of truth and sincerity and real humanity hidden behind conformism and morality. There is a part of fun and interesting analytic activity doing this, too, provoking, shocking people who have a SOOOO good opinion of themselves and show a mirror of their true nature.
And that's why I can be very cold, where i was just before very warm and charming ; it's not being a bastard, it's being deceived, after, AGAIN, trying to be sincere and really interested by you.
At last : "I am lazy, skeptical to an extreme, manipulative and untrustworthy, yet most people seem to like me this way, and I still don't know why." --> This !