Religious people do some very strange and inconsistent things. Some observe holidays to which they have no attachment in the name of a God in whom they don’t believe. Others appear to have an on/off switch that gets toggled to “off” every time they leave the church building Sunday around noon and head back to the rest of their weekly routine.
Apparently things were no different 2,700 years ago. Religious people were engaged in strange and inconsistent practices, and God sent the prophet Amos to Israel to point this out.