Sisters Paxton and Barnes talk about condoms and pornography. This is not something sister missionaries talk about and is simply a provocative portrayal meant to shock the audience.
Mr. Reed says that Joseph Smith had an affair with a 16 year old. This is in reference to his first plural wife, Fanny Alger who was not 16, but she was about 18 or 19 years old. Joseph was in his late 20s. You can read more about it
here.
Mr. Reed says that Voltaire said "with great power comes great responsibility." There is no historical record of Voltaire ever saying this, although it is popularly attributed to him.
Elder Kennedy travels alone to find Sisters Paxton and Barnes. Elders do not travel alone, they always travel with at least one other Elder.
Mr. Reed says that Mithras, a Persian God was born on December 25th of a virgin, performed miracles, and was resurrected on the 3rd day after this death. None of this is true. You can read more about Mithras on
Wikipedia.
Mr. Reed says that Horus was born to a virgin mother, was baptized, walked on water, had 12 disciples, was crucified and resurrected on the 3rd day after his death. None of this is true. You can read more about Horus on
Wikipedia.
Mr. Read says that Krishna was a carpenter born to a virgin mother that died and rose from the dead. None of this is true. You can read more about Krishna on
Wikipedia.
Mr. Reed says that the word Christ comes from Christos or Krsta, the Greek version of the word Krishna. This is not true. "Christos" comes from the Greek verb χρῑ́ειν (chriō), meaning "to anoint". "Krishna" is derived from the Sanskrit root कृष्ण (kṛṣṇa), which means "black" or "dark".
Mr. Reed states that the Latter-day Saints send disaster relief in order to control people that have experienced misfortune. This is not true. Millions of dollars are spent every year by the church to relief efforts across the globe in the wake of disasters, asking for nothing in exchange. You can read more about that
here.
Mr. Barnes corrects Sister Paxton by saying that Robert Frost said "The only way out is through," not the Swamp Thing, however this sentiment is actually originally attributed to Confucius.