I just had a thought what if mcallister used his years as visualize as a basis for his new "cult" the blake association with a cool password "Tyger Tyger" and a philosophy based on the poem by william blake which paints them as a necessery evil as cho explained"God created the lamb but he also created the tyger".

I think the way he gathered disciples is mentioned in the series(blackmail) when agent reed smith confesses about the association.He says he accidentally killed a 12 year old girl while drunk because he thought he heard someone following him.Later he gets a call from some people that they can make the charges go away he even receives an fbi medal of honour.The only catch is when you get called on you go and do the dirty work for the association