There is no law or legal precedent that mandates that a statute absent a severability clause is toast if one or more provisions of that statute are found unconstitutional.
What is the disagreement?
What is the law or legal precedent that mandates that a statute absent a severability clause is toast if one or more provisions of that statute are found unconstitutional?
Willett's dissent is a judicial opinion. A dissenting opinion is neither a law nor a binding precedent that presents a mandate.