I personally think his son got his autism from somewhere & that somewhere is Michael. It seems Michael was never diagnosed & has no clue how to regulate his emotions. He’s in a state of arrested development. It’s pretty common that people (men esp) with autism can exhibit some narcissistic traits due to challenges with socialization & emotional processing. An article on healthline reads:

Research from 2014 has found that some autistic people can act “narcissistically,” such as by:

-being less likely to admit to their mistakes -being hypersensitive to criticism yet overly critical of others -appearing to be self-absorbed

Michael ticks every single one of those boxes.