The charges against Barbara - "Disrupting the unity of the congregation" and "Undermining confidence in Jehovah’s arrangement" are refinements of a charge of apostasy.
Here's a condensation of the applicable portion of the secret JW rulebook, "Pay Attention to Yourselves and to All the Flock"
"The Scriptures clearly show that Jehovah forbids certain
conduct among his clean people; brothers need to up-
hold Jehovah's righteous standards regarding the follow-
ing: Manslaughter. . .
Sexual misconduct, including; adultery, fornication, and
other forms of "por.ne'a.." . . .
Apostasy.
Apostasy is a standing away from, a falling away, defec-
tion, rebellion, abandonment; it involves teaching false
doctrines, supporting or promoting false religion and its
holidays or interfaith activities. (Deut. 13:13, 15; Josh.
22:22, ftn.; Acts 21:21, ftn.; 2 Cor. 6:14, 15, 17, 18;
2. John 7, 9, 10; Rev. 18:4)
Those with sincere doubts should be helped, dealt with
mercifully. (Jude 22, 23; w82 9/1 pp. 20-1;w80 8/1
pp. 21-2)
Apostasy includes action taken against true worship of
Jehovah or his established order among his dedicated
people. (Jer. 17:13; 23:15; 28:15, 16; 2 Thess. 2:9, 10)
Persons who deliberately spread (stubbornly hold to and
speak about) teachings contrary to Bible truth as taught
by Jehovah's Witnesses are apostates.
If it is learned that a person has taken up association with
another religious organization, the matter should be inves-
tigated, and if verified, a committee should be formed.
If it is clearly established that the person has joined
another religion and intends to remain with it, the
elders would make a brief announcement to the congre-
gation that such- one has disassociated himself. (w86
10/15 p. 31 )
Working secularly for a false religious organization could
put one in a position similar to that of one preaching false
doctrine. (2 Cor. 6:14-16)
Celebrating a false religious holiday would be similar to
performing any other act of false worship. (Jer. 7:16-19)
The Bible condemns the following:
Causing divisions and promoting sects.
This would be deliberate action disrupting the unity
of the congregation or undermining the confidence
of the brothers in Jehovah's arrangement.
It may involve or lead to apostasy. (Rom. 16:
17, 18; Titus 3:10, 11 )
The practice of spiritism. . .
Idolatry. . .
Drunkenness. . .
Stealing, thievery, fraud. . .
Deliberate, malicious lying; bearing false witness. . .
Reviling; slander. . .
Obscene speech. . .
Failure to abstain from blood. . .
Greed‹gambling, extortion. . .
Adamant refusal to provide materially for one's ovn family‹leaving wife and children destitute when having the
means to provide. . .
Nonneutral activitics. . .
Fits of anger, violence. . .
Misuse of tobacco or addictive drugs. . .
Loose conduct. . .
SUMMARY: There are varying degrees of wrongdoing.
At times there may have been an overlapping of sins, and
this must be discerned in order to determine the proper
Scriptural view of a person's conduct. In all cases, elders
should carefully weigh each situation or circumstance.
They need to find out what actually occurred, the extent
and nature of misconduct, intent and motive, frequency
or practice, and so forth. Good judgment, reasonableness,
and balance are necessary as elders assess conduct in the
light of the Scriptures."
