EDIT: kinda in response to sunama, don't think Alonso will do anything to bad, but he could/would force Hamilton off track, he's done it before when he was on the same team,
Which race was this in? I don't remember this.
Im trying to imply that i belive he is capable of it yes.
Similar question: what gives you this idea?
From what I've seen the only guy currently in F1 who has shown that he will do underhanded things is Hamilton (ie. Hungary 2007, when he went against team orders, which resulted in Alonso retaliating). We've also seen Hamilton "push" other drivers off the track, though I do feel this is all part of racing and as a driver, you have to learn your race craft to be able to defend your position better.