Lasciel is a Denarian, so it is included in what I just said. How?
No, I don't think Lash or Lasciel had anything to do with Harry's reaction. I think we've got that pretty well worked out. Rage and grief triggered it, not unlike Michael's reaction to Father Douglas, who kidnapped his daughter. But as you point out Dina, that gooses the Winter Knight's mantle that in turn dumps gasoline on the fire of Harry's rage.. It wasn't too hard for Harry to stop Michael, but it took two Holy Knights and finally the angel of the Sword of Faith to bring Harry back to his senses.
Rudolph is another matter.. He may be infected, that would account for what has been going on with him for a number of years. However did the dominoes just happen to fall into place? Or was it some cosmic set up;
1] Things are going to hell in a hand basket, a huge giant is making toe jam out of the citizens.
2] Murphy who could barely walk and had to be pushed in a shopping cart like a baby in a pram, just a couple of hours or so ago, arrives on scene riding her motorbike with a bazooka on her back.. Okay, Mab was putting the juju on the area, no one was feeling any pain from injuries.. But freedom from pain doesn't insure the return of muscle strength and sudden healing of unrepaired tendons.. Yeah, Mab can heal a broken back, but she wasn't healing everyone.. Just Murphy? Suddenly she is strong enough to sit a bike and bob and weave through the city streets at high speed? Seem odd to you? We'll get back to that.
3] Murphy picks up Harry and they just happen to converge on the street where there is a daycare center that still has a bunch of stranded little kids and an elderly caretaker or two. Meanwhile Hunters and that big bad assed giant who wiped the floor with Vadderung's beserker Einherjan is headed straight for it.
4] They knock on the door telling everyone to evacuate! Low and behold if it isn't Bradley holding down the fort.. Oh forgot Sanya and Butters also just happen to be there. Bradley hasn't forgotten his soul gaze with Harry, and both Murphy and Butters remind him of the closed meetings they used to have that he had declared were bullshit.. Bradley is now convinced they were true, he is now on team Harry.
5] Getting the kids to safety isn't going to be easy because we find out that Rudolph is inside with the kids. He has not only soiled himself he has lost it mentally. Bradley goes in, clocks him, then is seen leaving the building, Rudolph limp over his shoulder and his two year old in one arm an old lady with an infant in the other, oh and somewhere Bradley still has his gun.. In his holster maybe? Frankly I am not sure, his hands were full, but if it was in it's holster, I doubt he would have lost it in the chaos...
6] Things get nasty because the giant has arrived along with more Hunters. Some clever moves are made to delay the giant.. Bradley drops Rudolph and somehow his gun, distracted with trying to save his kid, just leaves it on the ground with in reach of Rudolph, who is awake, groggy, but awake.. He picks up the gun.
7] Murphy pulls out her trusty bazooka and takes aim at the giant... Meanwhile Rudolph is screaming things about Harry and Murphy and the law, waving that gun around... KABLOOIE! Murphy blows the giant away, but there is no joy in Mudville, because Rudolph selected that minute to really get careless with his trigger finger... The gun goes off and Murphy goes down like she was pole axed.. You know the rest, but lets go back to number two...
Interesting don't you think? Mab takes away everyone's pain, and it sorta looks like she selectively completely healed Murphy's injuries so she can ride in on her big Harley... She saves the day, but ends up on the pavement dead.. Coincidence? Or in the light of her long term plans with Lara, Mab sets it up so the one impediment, Murphy, is taken out? How is that sports fans for a conspiracy theory.