It isn’t normal. My ex spoke with such aggression about my son too, when he was that age.
It’s another example of the aggression that’s lying beneath the surface with him. If he gets that angry about a (detail removed by moderator) being fussy about food, how will he cope with rudeness and tantrums later on?
We try to push these things under the carpet, hoping they won’t escalate. But saying he felt like punching a(detail removed by moderator) is very worrying.