People believe in what they can see. They believe that all Weeping Angels are bad and they just want more years lost to feed from. Well you are correct, except there is one exception. Because Weeping Angels can think and feel. You see, I'll go back to the original statement. People believe in what they can see. They see Weeping Angels as aliens, but they're not. While they are from another dimension, they're not an alien life form. But instead they are a Heavenly one. A celestial being wrapped in stone. They are the very divine power of God who had been struck down and their Grace turned to stone in order to preserve itself.
The thing is, Sam has to figure this out on his own. Or will he have help from a certain Trickster?