Uncle said that about nephew, didn't he love nephew?

If my uncle doesn't love my nephew, it's none of his business whether he lives or dies, let alone whether he eats or not. My nephew is not a child, but a 25-year-old adult. He won't starve to death without a meal. Uncle said that nephew, which just shows that as an uncle, he loves and cares about nephew, but the way of persuasion seems blunt, which is related to his character as a soldier. Therefore, as a nephew of twenty-five, we should understand him and should not doubt his uncle's painstaking efforts.