Yes, everything is seeded by ideas and the intellect. It takes generations, maybe even centuries for the implications of ideas to work out, but the intellectual arguments are always paramount.
I certainly didn't mean to imply the intellectual bit is not important.
Like all movements/anti-movements, the intellectual bit is very important to forming the core ideologies in society.
However, I think the average Muslim will change much more in terms of thinking what is 'moral' and 'right' versus some proof that Islam is false, made up...
To put it in context, polygamy is one of those that things that is largely removed from many Muslim communities, not by intellectual argument, but simply due to a different lifestyle and the emotion of sharing a man.
By in large the work to make Islam a reasonable religion is already done for us in the Western World. The competing intellectual movement already occurred in the the West with the enlightenment and separation of church and state... These are not new and Muslims in the West.
So I think a TV station like this does more for helping modernize Muslims than any intellectual argument or anti-Islam proof.