I will tell you why I have blind faith in free trade. It's because any alternative to free trade requires coercion. Coercion requires threats and acts of violence. I am a pacifist. I believe that all violence which is not directly engaged in reducing even worse violence (that is, I believe that a police are necessary) is evil, and counter to God's will. I think that violence is the worst injustice. Thus, I think that violence cannot be used to counter injustice. Thus, I am philosophically opposed to most laws which interfere with trade, e.g. a minimum wage law.
You can see that my faith isn't so blind as some would say. There's a train of logic which only requires one assumption: that violence is the worst injustice. I would say instead that some people close their eyes when it comes to regulations.