If you can not understand that someone would be uneasy with that, and if you choose not to read the news articles where Red Bull has stated their concern, you are just willingly blind because god forbid you say something positive about someone.
Sorry, but Vettel has nothing to complain about. He has no credible reason to believe that he will retire from the race this weekend and that Alonso will win the title because of it.
In the end, he’s just moaning because he lost the lead of the race, and he took it out on Karthikeyan for holding him up (but Hamilton watch catching him and it seemed like only a matter of time before he passed the Red Bull anyway). It’s nothing more than being a sore loser.