1. Before people vote you into power there are things they like and dislike. Its like a cost benefit analysis.
2. When one gets to power, he may live to expectations or not. He may be better than expected or worse.
3. As a result they are good chunk of Kenyans who don't want to make guesswork with Raila in power. He may become the best. Or just be ordinary. Or just prove critics right.
4. Specifically on incitement when in power, surely we have good example of Moi. Who deliberately incited tribal clashes which later others took it to another level. There are a lot "incitement" and mischiefs one can do while in power.
So it isn't rational at all. It's a world wide phenomenon. There those who thought Trump would be like the worst or the best or he will keep his promises or not. And still there those who still hate him with a passion and would gladly have him killed. And those who view him as some kind of Messiah incarnate. It's the way it is.
Suppose Raila attains power, who and why would he incite? I don't understand. This must be the irrational part of the fear.