Kanye is an artist and a special kind of individual who has very uncontrolled thoughts, unbelievable drive, and then an incredible ability to refuse to be effected by social influence.

Once Kanye has decided to do something, you don't talk him down. The danger here is that Fuentez is probably placating his biases, and affirming his ambition, which will work on him for at least some time before that bridge gets burned.