We're behaving like animals

Someone said a funny thing to me the other day. It didn't make me laugh overtly at the time, but as I relayed it to someone today I realised how true (and how amusing) it was. It was an inspector at the school I visited. He said he didn't like the way that when people acted violently or disgracefully, we say they are 'behaving like animals'. He said it was offensive towards the animal kingdom, and that the reverse should be said. When animals behave violently, we should, in fact, say that they are 'behaving like humans'.