His People are the elves like Abelas, who quite categorically tells you that you, if a Dalish, are not one of them, yet seems to recognise Solas as one of his own. For all we know may be he did at least recognise Solas as an agent of Fen'Harel if not the Dread Wolf himself because of the lack of Vallaslin.
Solas may have been reaching out to the Dalish and Sera or it could just have been another instance of him trying to assuage his conscience because of what he intends to do.
After all the original plan was to get Cory to unlock his orb and then when he had been blown to pieces, walk in and use it to destroy the Veil. Then when he found Cory hadn't died but had possessed the orb for himself, he decided to help the only person who seemed to have a chance of stopping Cory and getting his orb back for him. Presumably if it hadn't shattered in that final battle, he'd had recovered it and then used it pretty soon after to destroy the Veil, in which case the world would already be a wreck. Now he feels that he is doing us a kindness by giving as a temporary reprieve in relative peace before pulling the plug.
He makes it quite clear to a Dalish Inquisitor, whether romanced or not, that he is saving their life in removing their arm but ultimately they will die, not from the mark but through his actions. It sounds ambiguous if you are on good terms with him but check out You Tube for what he says if you are hostile from the beginning and he is much more explicit.
Unfortunately I think the modern elves are being suckered by him into doing whatever needs doing to achieve his aims without realising the implications for themselves. The Dalish have always hated humans for destroying their empire. I'd like to think that when they hear the story that Fen'Harel really did banish their gods, as they have always believed, but in doing so it was he who destroyed everything and made them mortal, that they would transfer that hatred to him. Trouble is I doubt they are going to get the truth from the Dread Wolf or his agents. As for the City elves, I suppose in a way they feel they have nothing to lose but again I doubt they have been given the full picture.
I'm hoping that in the next game, one of the options will be to keep the city elves out of the hands of both Fen'Harel and the Qunari. As for the Dalish, if the Inquisitor is Dalish then I would hope that some at least would listen to them but since PW, who is now lead writer, made the Dalish clan in Masked Empire seem such a pathetic, bigoted bunch, for whom hardly anyone seems to have had any sympathy, I fear the Dalish may be sacrificed by having them rush into the arms of the Dread Wolf.