User blog comment:SnapeFan1/Severus Snape's Death Scene Is Changed?/@comment-99.112.42.51-20110430213607/@comment-121.217.219.183-20110501102207

It would be a spoiler for the people who haven't read the books. If you've read the books, then no, it's not really a spoiler. And Voldemort kills Snape because he thinks Snape's the master of the Elder Wand, but he's actually not (so basically he died for no reason, which makes his death even worse), and Voldemort thinks that by killing Snape, he will become the master of the Elder Wand (but that isn't necessarily true). And I totally agree, Voldemort dying is fine!