You keep talking as if you have some knowledge about Jarno being mistreated. You don't know that Alonso was being favored, you just want the rest of us to BELIEVE that. What we DO KNOW is that Briatore was overjoyed when Jarno took his maiden victory at Monaco in 2004. But he became increasingly disenchanted and vocal about Jarno "underperforming" and complaining about the Renault Team.
Here is a contemporaneous posting from an F1 forum at the time, that pretty much sums it up:
"Jarno failed to score a single point in the last 5 GP's, although he had a very impressive first half of the season, but his downfall came during the French GP, when he 'forgot' to close the door on Rubens."
Renault were fighting for 2nd place in the WCC, which they had lost to BAR. Trulli was firing blanks when the team needed him to deliver on track. Flavio, as team principal, was certainly unhappy with the way things were going, but when Jarno let Rubens by on the next t last corner in France...THAT. WAS. IT!!! It was a fit of pique from Flavio, but it had been building. Jarno was not outperforming Alonso at that time. Far from it. Flavio loves to WIN, far more than he wants to UNDERMINE any driver, as you postulate. Jarno was underperforming and got the sack. He and Briatore even kissed and made up afterwards. Drivers getting sacked after losing the plot has happened throughout history, so no need for your grand conspiracy theory of Flavio giving "a lot of help" to Alonso. Fernando was delivering and Trulli wasn't, but France is what cooked his goose.;)
You seem to be a knowledgeable chap. Maybe you could tell me how many points Trulli was ahead of Alonso, after the French GP?