If Immortals are the only ones capable of being able to be Nfected, then the Denarians wouldn't be part of that.  They're immortal in that they don't die, but they also have Free Will, as shown by the fact that they can give up the coin and seek redemption.  They don't have an inviolable nature the way Maeve and others do.

One thing also to keep in mind is that while a soulgaze is accurate, it's not complete.  Soulgazing someone while they're suffering from a shattered leg they got in a house collapsing that also killed their dog will give a radically different result from that same person during Christmas with family and loved ones.

And no, Molly's soulgaze was indicative of her being at a crossroads where she could go down any number of paths.  Not an actual prophecy or foretelling.

Ramirez saw her inner demon and having seen that, he now knows enough not to let himself get seduced by her.

I can't imagine that all of Eb, Rashid, LtW, and Mai are on the Grey Council, because that would give them a majority on the Senior Council.

https://www.youtube.com/watch?v=31g0YE61PLQ

We don't necessarily know what Martha's comment was referring to, as Harry has been meant to be a lot of things.  Though that could be it.

Jim has said that the Council has a lot of info but hasn't yet put two and two together, so at large, they may or may not know until they actually think about it.

A circle goes both ways.  Butters used a circle to block Harry from interfering with the GPS.  And apparently Molly would watch TV from within a circle at her folk's place.

Also, because he couldn't find the body, as it was fallen into the lake.