He was acting like he could take the entire delegation if he had to even on the dock. He thought it was a bluff because he didn't realize he could command Alfred to grab everybody, and the narrative is pretty clear that Eb read it that way, but then Eb went ahead and pretty much backed his play by acting to the others like Harry was someone to avoid throwing down with. That should have made Mai even more suspicious about why he's suddenly that powerful in that place.  Allow him to get out of their sight once the fighting started after the way he'd been acting like he could take them all was monumentally risky, if she knew he could have them all snatched up and taken below with a command to the spirit.

She probably does know something about the island from their wars with Kemmler. But if Mai had been aware that "take them all below" was a capability open to the Warden, and connected Harry's confidence to taking up that mantle, I'd have expected her to shoot him in the back the moment he bolted.

As for Ferrofax, I doubt that he'd care one way or the other about what the lessor beings around him were doing, or Nemesis.  He demonstrated that in Peace Talks, he has his own selfish reasons for doing what he does, and at Bianca's party he was there only for the gold.

Bianca invited Harry to her party.. He wasn't going to go, then Susan stole the invitation and he screwed up and lost Michael's Sword to Lea.  He and Michael had to go to the party, from that moment on it was a set up,if not before.

I suspect it was already a set up.

I'm not sure whose set up it was; I suspect Mab, tho -- Lea's boss -- having Lea get Harry motivated to go to Bianca's party.  I remain convinced that Mab was deeply interested in recruiting a Starborn -- Harry -- as her next WK.  So Mab was both testing his mettle, and tempering him in the crucible of violence & confusion.

I wouldn't say he causes trouble in the cases you sighted.. In the case of Aurora, she was infected and started a war between Summer and Winter, yeah, getting her killed pissed off her mother, but she knew it had to be done.  What pissed her of is how it was done, the little folk using steel box cutters.  He didn't make the trouble with the Red Court they have been trouble for a millennia, but he finished it.

I'm pretty sure that what he's implying is that, to a suspicious mind with incomplete information, Harry could just as easily be taken as a Black Council member himself.

Who is the one Warden that isn't influenced by Peabody? Dresden. Who was Luccio brainwashed into starting a relationship with? Dresden. Where does the "Traitor" Morgan go for help when he's caught for killing LaFortier? Dresden. etc, etc.

Rashid even points this out when he confronts Harry at Demonreach in Turn Coat.

Easy Harry takes Lara to the Drive in in the Munster Mobile. What do they watch?

What We Do In The Shadows of course.

That is established fact from the text.

I think it is safe to assume that the White Court consider monogamy to be a tropical hardwood. We know Whamps are largely infertile and so spread it around, so during the period Raith was with Margaret he likely had hundreds if not thousands of sexual partners any of whom could have been Thomas mother. It may have been been a 1000 to 1 chance or greater that Thomas Mother was Margaret.

  That is possible, but his violent reaction was to the fact that Margaret consensually slept with Raith at all, let alone had a child by him.  However Eb may have been in denial about this for years.