Sun Myung Moon (born 1920) was the founder of the Unification Church, a movement combining Christian and Oriental religious traditions which focused on "God-centered marriages" as a way of saving the world. Enormous controversy surrounding the group erupted in America in the 1970s, leading to many kidnappings, deprogrammings, and much inflamed rhetoric.
You may be surprised to learn that the origin of Xmas dates back nearly 1,000 years. This very old, and sometimes controversial, abbreviation has its roots in the Greek language. Learning about its origins is a fascinating part of holiday linguistic history.