My uncle is disabled. My mother cooks for him. Why did he curse him and talk to him?

You'd better take him to the hospital first to check if he is mentally ill. This situation is not a normal person's thinking, but a symptom of intermittent mania in mental illness. If he is diagnosed with mental illness, his policy should be quite serious, and he should receive medication. This situation is probably caused by his physical disability and long-term psychological depression.