The LDS Church currently teaches they have the fulness of the temple ordinances and all that God intended to reveal on the subject. Again, I totally disagree. The LDS Church did not previously believe or teach they had the fulness of the temple teachings. That is a recent claim and is simply not true.
The attitude of mocking those who are believers in God and followers of Christ is common among those who have embraced the Hippie movement. The Great and spacious building is full of hippies whose acceptance of illicit sex and drugs is promoted through much of the music found at the modern rock concert.