Islam owns atheism with a single verse

[Angrboda]

A benevolent deity doesn't necessitate any specific reward unless said deity is infinitely benevolent.  Beyond being absurd, that's obviously not the case.

I think even if the deity is even mildly benevolent it would still imply an afterlife. Children under the age of 5 die in millions, every year, for no reason at all, a God with even a minimal degree of benevolence would redress that with another life.

It either does or does not imply it. There is no middle ground for "I think."