That guy should definitely go to jail for assault at the very least. From the beginning when he kicks his son, a case could be made for child abuse too. Really, if the owner actually had a gun he would have been justified in shooting the hoodie guy.
Minimum charge of aggravated battery (a felony in most if not all states), using the chair as a blunt instrument, and later the air pistol. Depending on the criminal’s knowledge of firearms, arguable attempt murder, but much more susceptible to defense challenge.
The son - if it is actually a son and not a boy toy - needs to be questioned too. This guy is a headcase and will escalate even from this outrage.