Using their tongues was not the only way they were mistreating each other.
They were jealous and bickering with each other over material matters. They were judging and "speaking against" each other. They were focused on amassing material possessions. In all these aspects of their lives they were leaving God out of the picture.
They were in danger of being just like the "Rich" (whose condemnation we explore next week in chp. 5).
Strong stuff! Walking with God should be all the riches and blessings any man needs in life.
Focus! Focus! Focus!
Join me in this expose of ego.