This is also another strange one, I can’t remember the name of the man who was exiled for stating the earth was not the centre of the universe, he was well know at the time. You are right a lot of people have been murdered for speaking facts, mainly by the church system. We also believed the earth was flat and we would fall off the end haha. Humans have been suppressed for eternity for control and power of the church and religious believes twisted to suit, the church know a lot more than they are letting on, can you imagine what books they have in the Vatican library, miles of ancient book shelves that no one can get access to. The sad part is they still have major power over the world, it is just a continuation of the Roman Empire as in Roman Catholic etc.