Purpose of Dumbloedore's Death

I think Dumbledore sacrificed himself for Harry, providing him the same protection from VOldemort as Harry's mother. We know Harry has to be the one to kill Voldemort, so really the only thing DD can do to help Harry is sacrifice himself, giving Harry the only weapon, love (as cheesy as it sounds) that can defeat Voldemort. With this in mind, I believe Snape is still a good guy and killing Dumbledore allows him to keep his double agent position with Voldemort as well as not break the unbreakable vow.

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Dumbledore's Death......

maybe dumbledore...created the same type of magical bond between him and harry that he had with his mother when she sacrificed herself.....that protects him while hes at hogwarts...

no DD didn't sacrifice himself persay but he was murdered. Sure he could have defended himself against malfoy, but he didn't die to save Harry so the magic that earlier protected Harry given to him by his mother would not be recreated by DD.