Ben doesn't have Cole's powers. He doesn't know precisely what is going through his friend's mind, right now. What distress or grief or fear he might be feeling. He can guess at the general shape of it, based on how tightly Cole clings to him, the way he hides his face like that. The sheer need in that little gesture burns away a good deal of Ben's fear and uncertainty. There's no room for those things, in the glow of the protectiveness he feels.

Maybe Cole doesn't really need rescuing - he can teleport, he can be invisible, he can defend himself with that knife of his. But it's not physical threats that Ben wants to save him from. It's this. It's the mindfuckery of the two of them wandering from the happiest morning either of them can remember in such a long time, into a place where Cole had gone through so much pain and hardship. Ben is going to get him free from this place, so that he never has to see its walls again, never smell it again, never be reminded.

"C'mon. Let's go, Cole. Let's get out of here. You lead the way, and if any Templars show up, I'll take care of them."

Ben gently disentangles himself from Cole and makes a move towards that crack in the wall. Adrenaline is still coursing through him, but taking action feels so much better than hiding, cowering, waiting for something to happen.