pastors enforcing cutting off 'abjects' that have left the church?

[Armoured]

Sounds very cultic to me.

My first thought

 

[JCFantasy23]

I would not walk away from this church. I would run.

No kidding - this sounds terrifying to me:

that the majority of the people who leave that church are abjects and the congregation should cut off all ties to them, even if they're related to them somehow.

That's actually one of the first warning signs when choosing a new boyfriend (or girlfriend perhaps) to avoid a controlling and abusive relationship. Certainly I can't see God wanting me to cut off my friends or relatives who feel called to attend a different church. Creating disharmony in the family of God is scary business.