1. It's heroic to at least make the attempt and not go out like a biznitch. At least make a failed attampt at something. That was crappy writing/direction.
2. Where the show didn't explain, which is irritating.
3. Because both wolves were there and the Warg said he heard someone in the silo. Jon could/should have killed bearded ginger then and he could have done whatever he wanted, tell Mance even whatever he wanted.
4. Because he's saved her a couple of times now. She looked to be a very perceptive character in the first season, and that's all out teh window now.
It played out somewhat like the books in that regards, though Robb's wife was not there in the book. Robb was struck by crossbow bolts and dropped, then SmallJohn Umber turned a table over to protect Robb for more bolts. Robb then struggled to rise in the books, but only made it to his knees. Then, Roose Bolton stepped in & took his sword to Robb's heart, saying "Jamie Lannister sends his regards." Not sure how breaking the cliche of that last heroic surge and following the book is bad writing/direction? Was it bad writing that Khal Drogo went out from an infection in Season 1, then ended up being smothered by his wife's pillow in the end? He didn't get the death worthy of a mighty khal who led 100,000 Dothraki. Or that noble Ned Stark was beheaded and not saved at the last second, also not getting a death worthy of a noble and honest lord. Or, maybe that Stannis Baratheon didn't go out nobly in the battle of the Blackwater - a last heroic charge into battle?
And the Orell the warg guy was trustworthy why?
Sure, the Hound saved her, but he also made it clear that he's going to sell her for ransom, not that he did it for the goodness of his heart. So, does saving her balance out with killing her friend, standing by while her father was beheaded and selling her like a piece of meat? I guess for you it does, but it would not for me.