Dave, re your statement that historians tailors the facts to suit their prejudices and that you cannot name a historian who carries out his research in a scientific manner. You are wrong , very wrong about this. I have been both a teacher and a student of history for many years. I spent a lot of my time teaching students how to do meticulous historical research.
As I have said on other threads, historians may not be neutral, but they can be objective and for the most part, they are. It requires patience and discipline to achieve this and no historian that I have met has altered or twisted facts to suit a political or personal agenda. That is a sin often committed by "hobby" historians" who have not taken the time to do intensive research.
   
You cannot name an historian who carries out his research in a scientific manner ! I would be very interested to know what historians you have read and how you came to that sweeping and erroneous conclusion.