How do some people treat the concept of an earthly kingdom?

Les explains that he has become aware from class people, and from letters or phone calls from the television audience, that some stand so rigidly against the concept of an earthly kingdom. They have spiritualized the Scriptures, treating everything pertaining to the Kingdom as spiritual. Consequently, they refuse to accept that the Bible teaches a literal, physical, and even political earthly kingdom. As he said in the previous program, that kingdom will include the animal kingdom, families, and tremendous reproduction, beginning with believing parents. Les also says he reads the opposition—such as the Book of Mormon, parts of the Koran, Armstrong material, and Jehovah's Witnesses material—because he wants to know where they are coming from, just as he studies those contrary to an earthly kingdom and Christ's Second Coming ahead of it.