I thought of that decades ago.
Turns out there are undesirable secondary effects. And we would still have heavily armed, religiously bigoted, nitwits fighting over a glass crater. If we are to do something, it should be somewhat more nuanced. Ideally, we should just walk away and leave them to it. If inter-religious or inter-tribal debate should reduce the population of North Africa and environs by, say, 40 to 60%, then perhaps religion may have finally have had a positive effect.