The phrase “nuke them until they glow” is a hyperbolic and figurative expression. It typically conveys the idea of overwhelming or complete destruction, often used in military or aggressive contexts. The “glow” part likely refers to the radioactive glow associated with nuclear explosions.
The phrase is often used in a sarcastic, humorous, or exaggerated way to emphasize taking decisive or extreme action against something, though it’s not meant to be taken literally in most cases.