OK, so here's the thing.
To most people, Naik seems creepy, furtive, intolerant, fanatical, and a liar. But here is the thing. He honestly believes in this garbage. In his mind, he truly believes that humanity cannot progress until it collectively accepts Islam.
He truly believes that all of the social, moral, scientific, artistic progress that have been made by humanity over the last few hundred years (and its not just a 'western' thing, it includes all the progress made in his homeland of India too) is worthless, meaningless, a mirage, not progress at all, but an impediment to the true progress of humanity - the destiny of man - submission to Islam.
I mean, this is delusion on the highest level of delusion. But it is delusion all the same, and as creepy, stupid, sinister, and bigoted as it is, Naik truly believes that he is a doctor administering a vaccine to a child, doing what is good for all, knowing the better, higher purpose and law.
Hence the corrective intent of these conferences. To clear up 'misconceptions' about Islam (by repeating the very things that make people dislike or be wary of Islam)
What a dilemma this is for him and his kind. The very thing that you assert as the proof and superiority of Islam, is what is at the root of all that is wrong with Islam, and all that makes people look at Islam with disdain. How to square this contradictory circle? One way, is to cloak Islam in rhetoric about 'peace' and 'progress', in order to at least try to make it palatable upon first appearence. The rest of it is about talking louder than people, talking fast, to use all the stock methods of the snake oil salesman, and by preaching to those as deluded as yourself, so that you can be happy in the illusions that you share, as the rest of the world moves on, pausing for a micro-second to laugh at your absurdity, then carrying on, making progress, making love, making the future.
SPOT ON! It's amazing how some people seem to buy his crap and accept Islam!
But as a great man said" You can fool some people all the time[blindly devout muslims].all the people some time[temporarily deluded converts and politically correct people who buy the shit],BUT YOU CAN'T FOOL ALL THE PEOPLE ALL THE TIME[Mother Nature's way of protecting humanity from psychos!]