It’s time to head to Jerusalem, where the crack in our culture will be exposed for every place and time, because the fundamental institutions of Jesus’ time and place will get it wrong and murder him. But first it gets exposed right on the spot through Jesus’ disciples. They have been brought up in a culture where Jews hate Samaritans (even though they worship the same God), so they are right on cue with their hatred.
We can see this, too, in the reading from St. Paul. When he speaks of “life in the flesh” vs. “life in the Spirit,” he is talking about two different cultures — the cracked culture that shapes us in the world and the new culture from God. A better translation than “flesh” would be “worldly.” Paul is talking about our culture being of the world or of the Spirit. Being raised in a worldly culture, no matter how good and important that is, there is a crack such that the bad stuff always starts leaking out. Notice the long list of sins that have to do with the Sin, the crack in the culture of pitting us against each other in all the ‘us vs. them‘s: enmities, strife, jealousy, anger, quarrels, dissensions, factions, envy. This is because even when we are able to live mostly with love and peace with those we consider ‘us’, we live with enmity and dissension toward them. There’s a crack in the culture.
It is mostly caused when we think that our culture, religion, nation, sex, etc., is the right and true one and the others need to be resisted and even destroyed.