The Division In The Church is caused by four main problems.
1. A Clique, a small exclusive group of people, and can be considered a circle, a posse or a club that share the same interest and opinion.
2. Factions, a group of clique within a larger group, party government, organization, or the like typically having different opinions and interest than the larger group.
3. Division, a group of organisms forming part of a larger group something that divides or separates. Separation by difference of opinion or feelings, disagreement or dissention.
4. Acts of Apostasy, which is believers rejecting the real truth. Believer’s who turn aside from following Jesus and deny Him after having previously confessed Him as Lord.
Scripture reference
1 Cor. 2:9-14,  1 Cor. 4:1-5