That is an absolute cavalcade of stereotypes. Even then it has a major hole. In your vision those children will still be born into the societal norms of their larger group.
Then we shouldn't allow gays to breed with lesbians to create a timeshare child. The same is true that the US should have actively stopped the intermarriage of blacks and whites for the same reason. India needs to stop the procreation of Christians since the social norm is Hindu.
An absolute false equivalence, save the "timeshare child" thing, which sounds disastrous for the well being of the child. Nobody in their right mind would argue that a child split between two homes is a preferable state. Regardless, there was no argument of banning anything made, so you've descended into hyperbole.
Would you not want to ban slavery? Do you want to keep these scientifically created children in their chains as the OP suggested they were in? You monster!