Questioning people about their tribe
There are so many beautiful and unique tribes in Kenya and many people take pride in their tribe, even though they would prefer to define themselves as Kenyans first.
This stems from the fact that there are many stereotypes surrounding many tribes in Kenya. So, when people are asked what tribe they belong to, they immediately think you are placing them under a stereotypical umbrella even when your question is genuine, and your intentions are pure.
Try generalizing questions pertaining to tribes by asking broader questions like, how many different tribes are in Kenya.