[Source:] Chief Justice Earl Warren's opinion for the unanimous court held that:
Marriage is one of the "basic civil rights of man," fundamental to our very existence and survival.... To deny this fundamental freedom on so unsupportable a basis ♦ as the racial classifications embodied in these statutes, classifications so directly subversive of the principle of equality at the heart of the Fourteenth Amendment, is surely to deprive all the State's citizens of liberty without due process of law. ......
1. I can't pinpoint why; so please advise, but I find strange and wrong the placement of the bolded {submodifier + adjective}? 2. What are some other formal terms describing this issue?
3. What are the similarities and differences between situating the bolded before or after the noun? Please beware that I ask in general for all syntaxes like the above, just for 'so unsupportable a basis'.