Whenever I hear a criticism of a biblical church doctrine as unbiblical because it's not quoting enough Bible verses, I relate this criticism to someone who criticizes a chef as unprofessional because he doesn't teach using citations and page references in cookbooks.
So this person is shallow and should go back to 101 classes. Biblical doctrines are founded on Bible verses you should already know, not to be taught to how to read English (or any language) again.