Kazon are delta quadrant klingon

The kazon and Klingons both stole technology and fight to keep it, fight like animals just to fight.

Klingons probably got started sooner then the kazon, but some number of years ago with some different configuration of forehead ridges, the Klingons were the same as the kazon.

Klingons and kazon are seriously just mean pakleds that are more successful. And ok, ya, smarter too.