After Tammy's death Chad told his children that she was on a mission beyond the veil. Earlier he managed to convince one of them to move back home because he was becoming dark. Tammy and the children likely bought the dark/light thing from Chad, including the numbering system. IMO it's less likely that they knew of Chad's prediction about Tammy. Perhaps after her death he explained it to them (he wrote on AVOW that he always knew that his life had two segments). Weeks before she was murdered, Tammy told her friends that she was in her best shape. Certainly not like someone who was predestined to die young.
So yes, his family believed that he was able to rate people and could ward off evil spirits. I'm curious when the children learned that Chad had been married to Lori in previous lives.
Unfortunately this wouldn't be the first case where the alleged killer was able to gaslight close family. It is understandable IMO. Who would believe their dad was capable of this?
I can certainly see why friends believed it must all be a ruse by Chad and Lori to keep the kids safe from big government etc - even when I watch the Hawaii video now - it does still feel so crazy that surely there must be some less horrific explanation? Surely no one would murder their kids and offer no explanation of where they went?