Answer: An attitude of bewilderment. We can see this in the phrase: " I had always thought you Ibos were kindly disposed to other people.”
Explanation: When Nene is talking to her fiancée, she wonders why he is so discouraged and indecisive about telling his father about the marriage. Nnaemeka starts explaining that not all parents react happily when their son gets married to a person they didn't choose. The words " I had always thought you Ibos were kindly disposed to other people”, imply that she is bewildered by this revelation when she had thought that there would be no problem with accepting her into their family.