Scrum doesn't attempt to address the technical issues in software development. It's just a small management process.
- The strength of scrum is that it doesn't get in the way by prescribing lots of unnecessary or irrelevant technical work.
- The weakness of scrum is that it doesn't tell you what good technical practices to do.
Extreme Programming does address the technical issues involved in software development and it fits very well within scrum. The reason the scrum people didn't force everyone to do the XP technical practices is that it takes about 6 months to implement those tech practices, rather than the 2 days it takes to implement the most basic scrum.
Whether or not scrum is "evil" - there are certainly drawbacks with it. We discussed the uneasy relationship between XP and Scrum at length at XP Days, London, 2009: http://xpday-london.editme.com/WhereHasXpGone
