What a maroon. This is a Constitutional Amendment! It can't be unconstitutional!
Ya think? What part of the Constitution was overturned to allow ex post facto legislation?
At least 127 Federal Acts have been declared unconstitutional. The states have overturned 4 Supreme Court decisions. Over 1,089 state acts have been held unconstitutional, another 124 state ordinances have been held unconstitutional. 204 SCOTUS decisions have been overturned by subsequent courts. SCOTUS has a history of inventing rights out of thin air - this week added several.
The legislators and justices are not perfect, nor are they gods.
Justice Black wrote that, '[t]hey stand for the proposition that legislative acts, no matter what their form, that apply either to named individuals or to easily ascertainable members of a group in such a way as to inflict punishment on them without a judicial trial are bills of attainder prohibited by the Constitution.' [United States v. Lovett, 328 U.S. 303 (1946)].