The author of that article was a member of Herbert W. Armstrong's Worldwide Church of God. They have lots of "interesting" beliefs, including Sabbath-keeping. They were generally regarded as a cult. Several years ago, however, the church leadership renounced most of Armstrong's teaching as heresy. Not all church members agreed with that, and many split off into separate groups. The author of the article you posted is a member of one of those groups.
What happened to the church after AD 70? It got bigger.
You're the man CP!
..x2You're the man CP!
Aw, shucks.