Frankly
I don't think Mecca much would be missed
even by the Moslems.
They'd get over it in a short while.
However
I'd recommend 24 hours warning be given
for women and children to clear out.
(I speak as one
who has had relatives do the Haj.)
Of course. We also gave Hiroshima and Nagasaki warning as well. We are not barbarians.