Generally, Ive noticed that Alonso is careful and understands the concept of finishing. He doesnt make the panic manouvres that Hamilton has done in the past.
Its unlikely that Alonso would jeapardise his own race, if it means taking a risk on the first corner.
Ive often thought about the fuel strategy. Personally, I am of the opinion that you should do anything you can to qualify in the first few positions. If you end up qualifying in 6th place, say, then after only 2-3 laps, you could find yourself 10s behind the leader. This would be insummountable if that leader happens to have a faster car than you. I think its best to fuel light, get in front, then if need be, you can hold the faster cars behind you. When you pit, you will be out of sync and will probably come out (after the pit) without any cars around you, allowing you to concentrate on getting the best laps out of the car, rather than following a slower car or risking someone (like Hamilton), running into the back of you.