I think Vettel knew exactly what he was doing. Hamilton left him plenty of room, but he moved right over to the left, and this allowed Bottas to easily just drive past him on the inside.
The replay also showed him making a quick little flick of the steering wheel to the left, which was when he hit Hamilton.
He did it with little finesse though and ended up taking half his own front wing off in the process.
Hamilton and Alonso racing wheel to wheel showed how really great drivers do it. Very hard, but completely fair.
Vettel doesn't understand the concept of fair. He is arrogant, petulant and spoilt. That and the fact he cracks under pressure, is why he will never be great, no matter how quick he is imo.
With a little more experience, Verstappen is going to be something to behold. He may well be the reason Hamilton never equals Schumachers record.
Alonso - I have the impression he is an arsehole of a character outside the car and away from the media, and while the top three teams have drivers who can win in their cars, then the aren't going to be interested in working with him. He has taken his career up a blind alley, and its hard to see it coming back, unless McLaren build a winning car.
I will be surprised if they do though, as the only person to win a title in a McLaren in almost 20 years was Hamilton. I think they are heading the same way as Williams. Perennial midfield runners.