Kaido actually gave Momo a chance to flee, too. Kaido told Momo to say he wasn't Kozuki, and he could go. Kaido just wanted to prove the Kozuki line was dead, he didn't want to even kill Momo. Kaido let the Scabbards live, rather than kill them, and refused to kill Momo the first time he met him at Oden's castle.
Momo and Hiyori are actually more racist and genocidal than Kaido was, shit is fucking hysterical, how is this even real?????