«كَلْبْ أَبْيَضْ وِكَلْبْ إِسْوِدْ. قَالْ: كُلُّهُمْ وِلَادْ كِلَابْ»

Outward differences, like a dog's coat being pale or dark, do not change what something fundamentally is. When several choices spring from the same corrupt or worthless source, weighing their minor merits against one another is pointless, because underneath they share the same bad nature.

The saying works as a sweeping rejection. Rather than ranking the options, the speaker condemns all of them together, refusing to grant any one a better standing because of a superficial virtue. It voices disgust with the whole lot and declines to take sides. It is not a neutral comparison or a plea for fairness.

Said with contempt when someone is asked to choose between two people, factions, or options that differ only on the surface. The speaker rejects the comparison, treating every candidate as equally rotten. "Sons of dogs" is a harsh insult; aimed at particular people, it is likely to give serious offense.