It's apparently too much trouble for them to read the Constitution literally.
Anyone who thinks the supreme court is going to protect our rights simply hasn't been paying attention.
The defendant in this case did not challenge the constitutionality of the Lautenberg Amendment. (Not that I think the Court would ever hold it unconstitutional--Heller explicitly said that the Second Amendment doesn't protect "criminals"-- but the Supreme Court does not consider the constitutionality of a statute unless one of the parties raises the issue.)