Why did Eastern Kentucky contain both Bush-Kerry and Gore-Bush counties?

[E-Dawg]

When the county maps for 2000 and 2004 are compared for Kentucky, it can be seen that Southeastern Kentucky contains about 3 Gore-Bush counties. This makes sense to me as Kerry performed worse than Gore in most rural areas. What confuses me are the 5 or so Bush-Kerry counties north of this area. What factors would have caused these rural, and now hard GOP areas to flip to Kerry? Why did this scattering of counties vote this way while the 3 or so Gore-Bush counties voted the exact opposite way?

[If my soul was made of stone]

I've heard some suggest that ancestral isolationist sentiment in broader Appalachia galvanized an anti-war vote among those who were otherwise heavily trending R at this point in time (looking at one of these counties, Menifee, for which Bush was the first victorious R since Hoover, but both Kerry and Obama subsequently won before the Dems collapsed thereafter, I'd wager it was at least the case there). I can't say that I know enough about the individual Bush-Kerry counties to hint at any other possible motivations.