SUBJECT:  The Church of God

QUESTION: What is the reason for all the division and factions in God’s Church?

ANSWER:

Reason for division and factions:

1) People are human.
Jeremiah 17:9
The heart is deceitful above all things, and desperately wicked: who can know it?
 

2) Not all in the church have the Spirit of God.
 

3) Not all are converted (even if baptized and members of the church).
 

4) Not all are at the same level of spiritual growth.  Some may be babes in Christ:

1 Corinthians 3:1
And I, brethren, could not speak unto you as unto spiritual, but as unto carnal, even as unto babes in Christ.

1 Peter 2:2
As newborn babes, desire the sincere milk of the word, that ye may grow thereby.
 

5) Some are wolves in sheep's clothing

Matthew 7:15
Beware of false prophets, which come to you in sheep's clothing, but inwardly they are ravening wolves.
 

6) Some have mental and/or social disorders OR personal problems (envy, jealousy, greed, desire for position or power, etc)
 

7) Some have quenched the Spirit of God:

1 Thessalonians 5:19
Quench not the Spirit.
 

8) Some become tossed to and fro on every wind of doctrine:

Ephesians 4:14
That we henceforth be no more children, tossed to and fro, and carried about with every wind of doctrine, by the sleight of men, and cunning craftiness, whereby they lie in wait to deceive.
 

9) Some will come to a point where they will not endure sound doctrine

2 Timothy 4:3-4

3 For the time will come when they will not endure sound doctrine; but after their own lusts shall they heap to themselves teachers, having itching ears;

4 And they shall turn away their ears from the truth, and shall be turned unto fables.

10) Some get obsessed about a specific doctrine or seemingly Bible truth (actually false) and hinder or destroy their own salvation in their obsession with it.  They will show a great need to propagate it and/or need to be right about it.

Note that some of these listed items overlap and can manifest themselves in combinations of these listed items.

And these are just some of the reasons.  There are many more each as complex as the human animal is complex.