He is who brought out those who disbelieved from The Book's people from their homes/countries to the gathering's beginning, you did not think/assume that (E) they emerge , and they thought/assumed , that they, their fortresses/fortification are protecting them/making them invincible from God, so God came to them from where/when they did not think/suppose, and He threw/hurled in their hearts/minds the terror/fright, they destroy/demolish their houses/homes with their hands, and the believers' hands, so be warned/cautioned, you (owners) of the eye sights/knowledge.