Ahsoka stops Ezra from saving Kanan, because then they would all die and because he had found the moment when he was needed most and did what he had to do for everyone. Though reluctant to do so, Ezra ultimately lets the blast consume Kanan.

What episode does Ezra kill Kanan?

Kanan was killed in the final moments of "Jedi Knight," and "DUME" featured the rest of the characters attempting to deal with his death.

How does Kanan Jarrus die?

In his final moments, he locked eyes with Hera, his blindness vanishing and his sight restored so that he could see her one last time. As the three take off, Kanan allowed the explosion to overtake him, killing himself in the process.