I am amazed that a backslider is being treated this way.
What happened to LOVE the sinner?
Gal 6:1-2
1 Brethren, if a man be overtaken in a fault, ye which are spiritual, restore such an one in the spirit of meekness; considering thyself, lest thou also be tempted.
2 Bear ye one another's burdens, and so fulfil the law of Christ.
KJV