Cloning is unsafe. There are too many unknown factors that could adversely affect the offspring. A clone might have a diminished sense of individuality. A clone might have fewer rights than other people. Doctors might use clones as sources of organs for organ transplants.
Cloning is at odds with the traditional concept of family.
Cloning is against God's will. Some aspects of human life should be off limits to science. In defense of Cloning would enable infertile couples to have children of their own. Cloning would give couples who are at risk of producing a child with a genetic defect the chance to produce a healthy child. Cloning could shed light on how genes work and lead to the discovery of new treatments for genetic diseases.