Having similarly feared Doomsday's revival, Superman went off to face him. ... It was also explained by Waverider that Doomsday had a literal genetic hatred of Kryptonian life, having the ability to sense Kryptonian DNA and thus view it as an automatic threat.

Why does Doomsday kill Superman?

Doomsday developed a strong desire to murder Superman, a desire that was later explained in the Hunter/Prey miniseries: "from the agony of continually dying during his creation process, Doomsday developed in his genes the ability to sense anyone Kryptonian, as well as an overriding instinct to treat any such being as ...

Does Doomsday hate Superman?

The Batman v Superman origin was referenced above. ... The Justice League animated series depicted Doomsday as a Superman clone created by Project Cadmus, brainwashed to hate Superman, and then shot out in a rocket when he became too powerful.