Right, they don't want Apple dead. But Mac OS X isn't going anywhere for awhile. Microsoft will continue to do stuff like release Office, VPC, etc.
At the same time, they are being challenged on some different fronts- iPod, Google (search and the online Office thing), etc. A little Mac success is fine (inconsequential in terms of Windows market share loss). But they don't want Apple gaining any really significant momentum either...
They also don't want Apple's convergence solution (FrontRow and whatever's next) gaining prominence at the expense of Win Media Edition.
I doubt we actually disagree on anything, we're just looking at different perspectives. I agree Microsoft doesn't really care that much right now., but I can see them foot-dragging on a new killer VPC for Mactel that offers really good Windows performance on Macs. All high tech companies are paranoid about 10 years down the road, starting around when Andy Grove wrote that book, don't remember the title (bend in the road, oh no here comes the future, something Dilbert generic like that.)