system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do terrorist groups like ISIS publicly announce when one of their leaders has died?

Isn't that counter productive?
gpt
Many such groups avoid it.  Mullah Omar, a big Taliban leader, was dead a couple years before it came out.  Still, they can't Weekend at Bernie's a terrorist leader forever and if they spin it right they can make their dead leader into a martyr to inspire their followers.