Q. 1. What are the basic teachings of the Jehovah's witnesses that make their movement a heresy?
A. 1. First of all, the Jehovah's witnesses's movement is one of those groups that expects the the imininent return of Jesus on earth. They believe in a one-person God, rejecting the teachings related to the Holy Trinity. In their opinion, Jesus is the first person that God created as Michael the Archangel.
"This group emerged from the Bible Student movement—founded in the late 1870s by Charles Taze Russell with the formation of Zion's Watch Tower Tract Society, with significant organizational and doctrinal changes under the leadership of Joseph Franklin Rutherford." [Source: wikipedia.org]
"The name Jehovah's witnesses, based on Isaiah 43:10–12, was adopted in 1931 to distinguish themselves from other Bible Student groups and symbolize a break with the legacy of Russell's traditions." [Source: wikipedia.org]
"Jehovah's Witnesses are best known for their door-to-door preaching, distributing literature such as The Watchtower and Awake!, and refusing military service and blood transfusions." [Source: wikipedia.org]
"They reject Trinitarianism, inherent immortality of the soul, and hellfire, which they consider to be unscriptural doctrines." [Source: wikipedia.org]
"They do not observe Christmas, Easter, birthdays, or other holidays and customs they consider to have pagan origins incompatible with Christianity." [Source: wikipedia.org]
"In May, 2011, the Gruppo di Ricerca e Informazione Socio Religiosa of the Milan Roman Catholic Dioceses declared in a convention that Jehovah's Witnesses doctrine are incompatible with Roman Catholic dogma." [Source: wikipedia.org]