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

[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.