Pesach is many things to many people. Its customs are familiar and can be viewed with many lenses. The symbols are universal and are subject to almost any reading: social justice, class, the Holocaust, Middle East politics, American politics, agriculture, the environment, the list is endless, and the proliferation of interpretations is evidence that this is fertile territory.
A few things – maybe only two – about the holiday are unavoidable, as in, Pesach wouldn't be Pesach if not for these...