His side of the Stonesprings reservoir is dryer and more dead than any other part of the overall lands. His pack is made up of rogues who agreed to let him take power and lead of their smaller groups in exchange for eventual great abundance. He takes pride in his silver tongue and rituals which many witness and face blood shed through these events. Alphonsus admits to his closer superiors that he only does them because he lusts for bloodshed and complete domination over others. His fake spirituality provides him this for those in a world without hope.
He has constructed a religion with many different constraints to those under his rule that they bend to, he doesn't believe he is a god... at least not yet.