Because you know hardcore conservative justice can just shut down change... because ultimately they are the most powerful entity in the US.
you realize kennedy is only "liberal" on some social issues, right?
did all change, barring those social issues, get shut down by the make-up of the court?
you realize the ACA, the most progressive healthcare legislation in our country's history, passed because of Roberts, right?
this notion that conservative justices are some demonic force that will make all liberal/progressive legislation impossible is just ridiculous
I don't doubt that a conservative majority court will weaken the federal government, but it's not a doomsday scenario, just like it wasn't the death knell for conservative social positions just because kennedy/o'connor were on the court