Fischer has a cause: immortality. He's against it.

Your statement is worse than uncharitable, given his essay:

Fischer argues (against the immortality curmudgeons, such as Heidegger and Bernard Williams), that immortal life could be desirable, and shows how the defense of the (possible) badness of death and the (possible) goodness of immortality exhibit a similar structure; on Fischer's view, the badness of death and the goodness of life can be represented on spectra that display certain continuities.