Just a guess, but perhaps Jacob and Esau can't physically hurt each other, and therefore have to find somebody to do it for them, ie the "loophole".
Now, My guess is that both men are capable of appearing as live versions of whatever corpses are on the island. Hence Yemi, Christian, Alex, Locke and probably some other guys I can't remember. This thing with the corpses having to be ON the island, is probably why Jacob didn't want Miles to come to the island, since he could accidentally ruin some of Jacobs plans if he came across a buried corpse of someone Jacob was appearing as.
We just don't know who has been appearing as who, and for what purpose, though it seems highly likely that Esau appeared as Alex in order to convince Ben to listen to Locke, who is also Esau playing dead-dress-up..
The beard and just a gut feeling makes me think it was Esau trapped in the cabin, and once Locke entered with Ben, Esau saw a possible loophole in Locke, recognizing him for the father-figure hungry higher purpose needing man he was, and started to work on him right there. Ben, having never met Jacob, couldn't possible know it was Esau who was actually talking to Locke.
Now, My guess is that both men are capable of appearing as live versions of whatever corpses are on the island. Hence Yemi, Christian, Alex, Locke and probably some other guys I can't remember. This thing with the corpses having to be ON the island, is probably why Jacob didn't want Miles to come to the island, since he could accidentally ruin some of Jacobs plans if he came across a buried corpse of someone Jacob was appearing as.
We just don't know who has been appearing as who, and for what purpose, though it seems highly likely that Esau appeared as Alex in order to convince Ben to listen to Locke, who is also Esau playing dead-dress-up..
The beard and just a gut feeling makes me think it was Esau trapped in the cabin, and once Locke entered with Ben, Esau saw a possible loophole in Locke, recognizing him for the father-figure hungry higher purpose needing man he was, and started to work on him right there. Ben, having never met Jacob, couldn't possible know it was Esau who was actually talking to Locke.