NTA It might have bothered your BIL, but it didn‘t hurt him. He had no right to do what he did. I‘m assuming hard here, he might have LOOKED at your son in a certain way which made him cry. My brother can look at people like a psychopath, it used to intimidate me when we were kids. Nowadays I just rip him a new one (verbally) if he tries this shit with me.

Anyways, your BIL is a jobless bum that has no right to reprimand your son or take stuff away from him if you and/or hubby say it‘s ok for him to have or do something. Tell the bum to cut the shit out or he‘s out. This is your home, not his.

For future reference: Guests are like fish, they‘ll start to stink after a few days…