Snape's Betrayal
Okay, i've only started this thread coz i'm sick of reading drips and draps of HBP in various orders and picking up on things only a few seem to be doing. People are arguing with the things that seem the most likely and giving totally horendous reasons for snape being good/evil.
so, i ask you first, why then did snape not attack harry until the last possible moment as Harry chased him across the grounds after DD's death? why did he constantly defelct Harry's attacks and continue to run? surely snape could have killed him there and then?
also, people have mentioned the possibility that Snape made an Unbreakable Vow to DD. why can't people see that this is the most obvious reasons for DD's trust?
DD made snape take the UV after he defected to the Order and the fact that snape isn't dead means that he remains loyal to DD! and even if he didn't do it then, i think it could have been made some time during HBP year.
didn't DD constantly argue with harry over the Malfoy/Snape situations. didn't DD seem sure that he knew what he was doing... what malfoy was doing? i think its likely that DD knew what draco was up to because he had snape spying on him. Snape was reporting everthing to DD and they must have realised draco had to kill DD.
thus, knowing that he had made an UV to narcissa, snape realised that he would have to kill DD becasue there was no way draco would be able to do it. so snape must have made an UV with DD that cermented DDs trust in him, deeming that DD wanted snape to kill him if it seemed likely that draco would not suceed.
either way, this mean that DD would die and he accepted this because he knew that when Harry came to face voldemort that he would have to do it alone--or at least without an adult to protect him (which begs the possibility that ROn, Hermy and Ginny, poss neville and luna, will be with him at the end)
its like in star wars empire strikes back. "if you chose to face vader you must do it alone... i cannot interfere."