"How can the unenlightened, ignorant, religious, superstitious masses so intent on the destruction of science verify this proposition?"
Well, you could reproduce Michelson's original experiment that measured the speed of light.
I'll accept, by faith, that what science textbooks tell us about the speed of light, especially since it is subject to regular testing. What I will not accept by faith is what science textbooks purport to know about the history of the universe.