system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] Why did Snape's Avada Kedavra kill Dumbledore?

I've recently read on here that spells like Avada Kedavra on really work if you use with with passion and commitment. I just watched the 20th Anniversary and saw the Dumbledore's death scene and understandingly Snape killed Dumbledore reluctantly.
gpt
He was committed. He had promised Dumbledore that he would kill him, both to spare him the painful death by curse that awaited him, and to spare Draco from having to do it. 

You don't have to *enjoy* it - you just have to *want* it. At least, with the killing curse. Other spells can and do have more emotional requirements.