In all probability Schiavo is an old fashioned self centered SOB, but this case has become a cause celebre for the Pro death forces as represented by Felos and the slick evil pro death cult movement he is a a part of. Schiavo may have become a victim himself, certainly in his own mind.
Yes, Felos is a human parasite.
Ticks were created with the need to suck blood.
Some humans, like Felos just devolved.