There is some Truth in the post. One very large and once militant organisation controlled much of the development of the world for well over 500 years. They sought out and destroyed and killed anything or anyone that questioned or proved anything other than their "truths". They delivered the dark ages which many believe that if that period didn't happen we would now be capable of interstellar travel. They also organised massive exterminations of people who did not follow their beliefs, and gave them the noble name of Crusade. If you don't already know who this organisation is you might get a shock when you figure it out.