I don't interpret his usage of the word pure to describe the character of the individuals in the group, but instead pure in the sense of the group being "entirely made up" of Christians - in the same sense that one may say "pure salt" refers to the salt being uncontaminated by other things being among it

I don't interpret his usage of the word pure to describe the character of the individuals in the group, but instead pure in the sense of the group being "entirely made up" of Christians. In the same sense that one may say "pure salt" refers to the salt being uncontaminated with other things among it