Hi J-DUBBED, It sounds like your son's weakness is his daughter. Have you contacted your son's ex-girl friend and told her about cult-exit counselors such as Steve Hassan's methods for helping someone to critically think for themselves as well as not going off on tangents when feeling cognitive dissonance. At least send your grand-daughter's mother the following video by Steven Hassan so that she can help her daughter to critically think for herself: Strategic Interactive Approach explained 2003 (1:23:23) .
Best of wishes helping your family members.
Peace be with you and everyone, who you love,
Robert
The problem is there are two Grandaughters. One four year old from the ex-gf and one two year old with his new bride. Just don't know how to approach him with these conversations. For a couple weeks talking to him was not a problem.......Because nothing was brought up about Religion or his wife.
I also can't open that link you posted.