Sorry, but children do need to learn that their behaviour has consequences or would you rather his behaviour escalates until he ends up in trouble with the police or excluded from school?
Are you suggesting that because the dad went nuclear the son will never, ever steal, lie, drink, stay out late, or smirk at his father again? You are offering as justification here the hope that this dramatic act of violence will do the trick and prevent all further problems.
I don't think that's how it works when a relationship between parent and teenage boy is on the rocks so early in the teen years, which this one is.
In fact, the likelihood of escalation by both parties is now quite high because someone has to come out on top here in your model of family relationships that is based on the law of the jungle; experience from nature indicates that it is the younger individual who will see off the older one.
Children of course need to learn that their behaviour has consequences. But there is a huge difference between imposing an appropriate and predictable consequence for an infraction of the rules* and going nuts over something that wasn't in the rules.
- If drinking beer is such a no-no that it causes such immense anger, don't give mixed messages about drinking and don't have beer anywhere the child can get it.
If the loss of the beer is what triggered such anger, maybe examine your own relationship to alcohol too.
To look at a wider picture - beer is very much a symbol of adulthood, isn't it?
The privilege of drinking it is reserved for adults for many reasons, but essentially it remains associated with adulthood and is considered a privilege.
I have a suspicion that this fight was the opening round of a huge struggle between father and son as the son moves from child to adult. I don't think this fight would have happened over the son eating yogurt.
The house will be a battleground unless they can work really hard on establishing a relationship that is based on civilised behaviour and values. When I say that I of course expect the dad to take the lead because he is the adult here.
It behoves him to take the time to think about what it means to behave like a grown man in civilised society and to find within himself a better relationship model to show to his son than the one he showed in the phone incident.