I have the feeling that all the last week spoilers are confusing us… We have read that Rumpelstiltskin made a vow that changes everything, blablabla…Maybe i’m wrong, since English isnot my native tongue and maybe i understood it wrong, but that last escene with the seer he says “then i just have to kill him”, that is to not a sort of vow, just a “why are you making a big deal of that? I know how to take care of myself, i’m the dark one!”
BUT, he swears to his newborn son not to leave him. (And this is the par i’m not sure i’ve understood well)
With all this I mean that maybe what changes things is that Mr.gold looking for his son is not only the act of a man who regrets leaving his son, but the fulfilment of a previus vow -something, in a magic-fantastic world, stronger even than feelings- and the last escene is just a “may be IF Henry turns out to be a threat in any sense, he could be in a danger” to which we are putting to much attention because of the sopilers.
As I said, maybe i understood it wrong, but, i don’t know, it is quite tricky.