Neither genes nor environment can implant ideas in a child's mind and make him accept them. Cloning the body will not clone the mind. A mind is inescapably under the individual's own volitional control. It was not Hitler's genes but his choices that made him a monster. Yes, the technology of cloning can be misused.
Any technology can be.
In particular, parents might treat a cloned child not as a unique separate individual, but as if he were a reincarnation of the person he resembles. Worry about this kind of problem cannot account for the virtual panic over human cloning, nor for the fact that the anti-cloning clique opposes human cloning across the board, in any quantity, for any reason. Human cloning would emancipate not only infertile couples but also those fearing birth defects inherited from one partner. Further, progress in cloning technology is linked to progress in other life-enhancing biomedical applications, such as new weapons against cancer and aging. Restricting one technology retards all.