Mafia 101. Disputed Island

an absolutely nonsensical decision by the flamboyant Shaman, followed by reciprocal accusations.

Still, Shaman was executed... Shaman, the mafia...

Well, I don't know – I really don't know.

Even if it's three.
Jen Li. Well, in a pinch, even Zero would work.

Added 46 seconds later
Or am I missing something?

Well, if you think that Snowman was trying to protect his own, then he is indeed Zero.
Or he could be Nancy, who was recruited (it's possible, hypothetically?). That is, he was Town, and then Shaman asked Zero to go to Snowman, and voilà... Is that possible? ) Well, I wouldn't rely too much on that, but I wouldn't completely dismiss it either.)
Jen Li... Less likely, though. If that's the case, the only explanation for Snowman's persistent desire to execute Alex is that he was exposed as a strong, unrecruitable Town role. Otherwise, revealing himself like that is, to put it mildly, unwise (and it's also doubtful).