Mr. Laser Beam wrote:
Wouldn't any human survivors left in the colonies eventually die of radiation exposure?
Many would die, sure, but not all. Radiation wouldn't easily cover an entire planet, it would be concentrated in certain areas and fallout would be carried around by prevailing winds. But there would definitely be areas exposed to very little or no radiation. The number of nukes required to totally saturate a planet with radiation is too excessive to be practical, even for Cylons.
Besides, the Cylons moved in after, so clearly they didn't want to make the planets totally uninhabitable.