Jay Wye makes a category error. Killing a tumor with human DNA does not kill a human being. Killing a fertilized egg with human DNA does kill a human being. How do we know? Through the weeks the fertilized egg (which is an entire human being) becomes a larger and larger human being. If one waits nine months, the tumor does not become a human being. It remains a tumor.
Perhaps Jay Wye has not noticed that like the fetus, he too is a lump of cells. Even at the moment of conception, this is no undifferentiated lump of cells. That is simply misleading propaganda.