I'm not gonna slag the church with which Newton is affiliated, but I will say that your brother has fallen under the influence of a very evil individual. Newton basically is using the church as a means of obscuring his past (name change) and as an attempt to legitimize his insane philosophy and beliefs. Newton has a documented history of being a cult leader who has subjected his followers to brainwashing techniques and physical abuses.
When confronted by his victims, Newton will deny any wrongdoing, and will attempt to place the blame for any problems he and his "programs" created for his victims, on the victims themselves. Neither he nor his wife, Ruth Ann Newton, believe that they have committed any crimes or oversaw the systematic abuse of hundreds (if not thousands) of adolescents, though several courts have found otherwise.
Your brother is in grave danger should he continue associating with Newton. Not only will Newton encourage him to sever any ties with his family, but he will also attempt to convince your brother that should he fail to follow Newton's instruction he will meet a horrible fate. If your brother is suceptible to cult indoctrination--and if he is associating with Newton he probably is--then he is on dangerous ground, becuase Newton will manipulate him to the best of his abilities.