I would call a "non-constitutional" decision of the Supreme Court (to the extent that that is not by definition an internal contradiction) to be an erroneous decision. An "activist" decision is typically a label applied to a decision in which the Supreme Court concludes that a legislative body (state of federal) has exceeded its constitutional powers.
Originally liberals were social conservatives who advocated growth and progess mostly technological(knowledge being absolute/unchanging)based on law--reality...the nature of man/govt. does not change.
Atheist secular materialists through evolution removed the foundations...made the absolutes relative and call all technology evolution(science) to substantiate their efforts--claims...social engineering--PC!
Liberals/Evolution BELIEVE they are the conservatives too!
What's left?