I would tell him his actions are wrong because they are immoral. They go right against the behavior needed to ensure a happy and well balanced society. Altruism is an evolutionary trait that has developed to help us get on and function in groups, to help each other and to care for each other.
However, he would with me, just as he would with you, tell me to get stuffed.
However, he would with me, just as he would with you, tell me to get stuffed.