That's not how the Prophets function though, given their behavior for the rest of the series. We've never seen any indication the Prophets are killers.
SISKO: I was ready to die with her.
BOLIAN-PROPHET: Die? What is this?
AKOREM: Then I've been wrong about everything. You should've let me die.
KIRA-PROPHET: We still can.
PORTA-PROPHET: We can return him to the moment we found him.
ODO-PROPHET: Allow him to die.
For a species such as the Prophets (a non-corporeal non-linear race of beings) death means little, if anything, to them. I'm not classing them as "killers" but they have shown willingness to take life as it suited them.
Commander Austin Harris, First Officer, Deep Space Nine (by FltCpt. Bossco)
8.01 - Darkest Before Dawn
(Chapter 8 added, 12/09/2015)