What causes killer Kane to shift his attention from loretta to max?

Killer Kane shifts his attention from Loretta to Max primarily due to his desire to exert control and dominance over his son. His frustration with Loretta's defiance and her protective nature toward Max fuels his aggression, leading him to target Max as a means of reasserting his authority. This shift highlights the toxic dynamics within their family, where Kane's need for power ultimately drives him to threaten the safety of his own son.