This is not the goal of geneticists. The idea of gene therapy is to cure hereditary diseases not make any one person or race superior. Another consideration is religion. In reality gene therapy is just that- a therapy. It is a new form of advanced medicine.
Gene therapy is completely up to the individual in question.
If religion is a factor then somatic cell therapy should be applied. This allows the next generation to make their own decision. Some groups claim that regulations will be hard to control, even with laws there is the possibility gene therapy could become available on the black market. It could be used for any genetically linked trait such as eternal appearance, personality, or physical enhancement. These concerns will have to be dealt with in time.