There is a lot of sense to the whole Carlos corrupted by Nemesis.  Jim has said repeatedly that people corrupted do not behave the same, they change fundamentally. They start doing things against their nature.  I really don't think Carlos was changed by the Molly experience.  He wouldn't hold that against Harry in any case.  On the other hand, suddenly Carlos is acting all suspicious of Harry, showing up in the middle of the night to ambush him?  That doesn't sound like the Carlos of old.  The one who put his life on the line and got himself locked up to support Harry during Changes? That doesn't jive.

I think Harry getting booted out of the WC and the wardens was part of Nemesis' plan to weaken Harry.   Mai and maybe Christos have been corrupted by N.   I think Carlos was also infected.  Why else would he turn on Harry that way.  He believed in Harry and trusted him.  He knew Harry had a dangerous side from that time at Camp Kaboom.  Why would anything Harry has done since change his mind? Especially after the talk they had at the end of WK.

I'm beginning to think Harry being Starborn gives Harry some protection against the Ninfection.  What about Drakul you say? Drakul was just acting in self interest not corrupted or fighting for a cause.