Some are asking whether Supreme Court Injustice Samuel Alito damaged the Court's credibility with his mouthing of "not true" during President Obama's State of the Union Address. But the Court had precious little credibility anyway. The Supreme Court (or, more accurately, the right-wing injustices) threw away the court's credibility with Bush v Gore. Whether it is hopelessly lost remains to be seen.
Individual injustices — namely Alito, Roberts, Scalia, Kennedy and Thomas — have discarded credibility repeatedly with their predictable support of big business over individuals, the rich over the poor and conservative government over the rights of the people.
So the Supreme Injustices are predictable, reliable in some twisted way but certainly not remotely honorable.
As for Alito's performance during the State of the Union, he should count himself lucky Obama didn't dress him down more. The president used the most mild language. He could easily and rightly characterized the ruling of the Fallen Five as one of the worst decisions in American history.
The Supreme Injustices, the conservatives, are accustomed to being able to humiliate those appearing before the court. They are accustomed to asserting their opinions with the servile accolades of a captive audience. So it must have been tough for Injustice Alito to have to sit still while Obama treated his crimes so mildly.