The most telling thing, apart from the intimidating following in the street and threats of violence from the 'people' he can call on, is his entitled comment that the world is his oyster and he can do what he wants. She obviously can't, in his predatory view.
Public space is male space; males dictate what females are permitted to say and do. Having a voice, expressing a view - even on the phone to her mum - is too much personality and assertiveness for him to handle.
This is the sort of man who assumes all half-heard conversations and innocent laughter are about him and feels threatened. Women are in the world on his sufferance and must conform to his expectations.