Isaac Hayes had a stroke?

Strokes rob one of intelligence.

Diminished intelligence shows up in ways which might not be predicted.

The primary generalization is that a stroke victim becomes far more self centered, incapable of understanding, and unwilling to consider perspectives beyond his own.

Andrew Sullivan points out that Isaac Hayes, in very recent times, demonstrated a highly intelligent personality. He was able to sort out being a bit in the criticism quite well.

And then, he went off, and sounds like the village dolt.

The good news, there is hope. The effects of a stroke are mitigated by time, particularly the first year. Chef may well be back for real.

Update:
Chef's death, and more about the stroke here.
Apparently, Hayes himself didn't say any of those things. Some Scientologist spoke on his behalf.