Liberals fear that the right will legislate (or appoint justices who will dictate) what used to be known as conventional morality, in the bedroom and regarding reproductive rights. Conservatives are afraid that the left will legislate (or appoint justices who will dictate) an end to conventional morality regarding those same things, as well as marriage.
In the fiscal arena, conservatives are afraid that liberals are bent on legislating a new fiscal morality based on covetousness of the successful, and a class warfare “fairness” that will end up killing the golden goose of capitalism and impoverishing us all in the name of a hypocritical “fairness.” And liberals of course say that conservatives are bent on screwing (financially speaking, that is) everybody but themselves.
Note that in the above two paragraphs I am speaking of “liberals” rather the “the left.” When I say “liberals,” I’m attempting to refer to the group of well-meaning and not-all-that-political people whom I know very well. I am not referring to the far left (a few of whom I’ve also known fairly well) , who are completely different in beliefs and motives. And yes, I’m aware that the former group enables the latter and is mostly controlled by them, although liberals may be largely unaware of that fact, or of the motives of the far left.