If you mean in Revenge of the Sith, the reason why is because Anakin has become someone Obi-Wan never imagined. And anyway, there was nothing Obi-Wan could have done anyway.
Obi-wan could of took Anakin and kept him somewhere and got him to realize that Sidious is not his master, and it's not his destiny to become a Sith.
Obi-Wan Kenobi
Obi-wan dies in Episode IV A New Hope because Darth Vader killed him.
yes, Obi Wan killed him
Obi-Wan Kenobi.No, Cartman as Obi-Wan Kenobi.The controversy rageson...
Obi-Wan Kenobi was created in 1977.
Yes, Obi-wan and Darth Vader fight twice. Once on Mustafar, where Obi-wan was the victor, and once on the Death Star where Darth Vader killed Obi-wan.
Obi-Wan Kenobi was born on the planet Stewjon.
Obi-Wan Kenobi was played by Ewan McGregor.
Obi-Wan Kenobi
Obi Wan Kenobi
Obi-Wan Kenobi
wow really anyway obi-wan's name is the same but his full name is Obi-Wan Kenobi