There are two ways of trolling in order to propagandize against evil: 1) To get the truth out in a way, so it mocks and makes fun of the liberals and their hypocracy. 2) To instill hate and fear among different groups of people against each other (f.e. liberals/conservatives or muslims/christians,) so the current course of the world is sabotaged as a product of their lack of ability to coexist (coexist in the wrong way, that is.)
In order to create an effective troll personality that can generate much hate and instill fear between different groups on an internet web forum or on the usenet, the most reliable way is to start with casual discussion, where the troll beats the target discussion participants, and then gradually go on to hotter subjects. It is really a method of gaining trust so the participants will take the troll serious, when he goes on to propose highly controversial subjects. This way it is much easier to get people to belive that some really extreme troll is a genuie person. The troll might also succeed in drawing participants over to his side, if he have made himself enough of an authority in the eyes of the participants in this way.