So she is completely innocent because at the last moment she decided not to commit genocide? (Y)
Yes, many people would do the same. Because they go crazy after seeing their town destroyed
1. I don't care. If you have spies in the enemy capital to find out the location before they arrive, that's the same as stealing.
2. Jaina is the leader of the Kirin-Tor and uses her power to aid the Alliance AGAINST the Horde.
Thrall helped the Darkspear Trolls against Garrosh. He didn't favour the Horde over the Alliance, so it's not the same.