Back-story Spoilers!!!!!! The Mcalister Clan made the trip from Ireland with the 
Janes and other important clans. The clans where mystics and masters of 
the dark arts. There was much division among the clans related to the 
luciferian religion. The religion it self is not considered bad but 
rather dangerous if used by the uninitiated. The Mcalisters began using 
there skills like parlor tricks early in the 19th century until the 
great rift. It was the council of the elders that the Clan was banned 
from the practice of black magic. Mcalisters practiced in secret until 
the gifted RED JOHN appeared. Mcalister is the  figurative embodiment of
 the great dragon with the Blake society being the true force of the 
cult. RED JOHN merely practiced human sacrifices as part of his 
luciferian religion.  RJ took offense when Jane spoke callously of his 
religion and sacrificed his wife and child as act of contrition and 
vengeance. The FBI has been looking into child and adult abduction and 
sacrifices cases since the 60's but very closely since 80's. The Red 
John ascended master period. Stiles was practicing the white version and
 RJ the black.
        
