Delusion:

  A false belief or judgment about external reality, held despite 
  incontrovertible evidence to the contrary, occurring especially
  in mental conditions.

I don't doubt the person actually thinks what they say they think. I don't think the experience of spreading propaganda involves self awareness that one is spreading propaganda. I think the nature of propaganda is that it is self propagating without a structure that consciously propagates it.

Delusion in the form of denial is a natural response to grief. "This entity that I am apart of is doing something heinously evil" would naturally cause grief. I experienced grief in regards to Iraq and Afghanistan because I believed my country was doing something evil.

Denial is the first stage of grief, and I think we are seeing denial in the form of delusion, delusion supported by propaganda.