First I’m sorry someone thought what you wrote was funny. People can be so mean.
Did he know someone he was close to that died from covid or got very sick? What is his age? Is he unemployed because he is afraid of covid? He can get a job and keep himself safe. No one can tell you not to wear a mask no matter what kind of job he will get. Other ways he can stay healthy is eating right, exercise, take a vitamin. You want to have a good immune system if you do come in contact with covid. That’s what I do I hate wearing a mask. Now for the yelling does he yell all the time like he is hard of hearing or only happens when he’s mad?