I think the reason for this homogenization and the massive bent towards legalism can be found in the interaction between the masses and Bunyan’s “Mr Worldy Wiseman”. His advice is that to know Christ is not a bad thing, but that through legalistic pursuit of Him, we can make our religion much less difficult on ourselves and others. He tells that love is good, and that is why we should make our faith safe to the comfort of those we “love”. Wordly Wisdom tells us that it is loving towards our families and friends to make “Christian” a safe and respectable person.
Oswald Chambers wrote that it is very important that we consider the cost others will incur because of our own discipleship and pursuit of Christ. When we follow Christ it costs others, but Worldly wisdom tells us that the “loving” Christian does not inconvinience others if he truly “loves” them.