What really rips us apart: selfish living.

 I Corinthians 8:9 But take care that this right of yours does not somehow become a stumbling block to the weak. 10 For if anyone sees you who have knowledge eating in an idol's temple, will he not be encouraged, if his conscience is weak, to eat food offered to idols?11 And so by your knowledge this weak person is destroyed, the brother for whom Christ died. 12 Thus, sinning against your brothersand wounding their conscience when it is weak, you sin against Christ. 13 Therefore, if food makes my brother stumble, I will never eat meat, lest I make my brother stumble.
The Corinthian church seemed to be masters of division: if there was a way they could offend one another, they would find it.  The simple truth is that Satan will use the most available weapon possible to assail the church: our own selfishness. In our selfish society we are all about individual rights.  Paul tells us earlier in this chapter that eating food offered to idols is in and of itself not sin, because if we see idols for what they really are - not gods at all, then worship of them is empty.  But all of us have backgrounds, baggage, and ways we need to grow.  And the Body cares about each other.  If we live (or WHEN we live) as if our own individual happiness is king, we will hurt each other repeatedly and deeply. Eventually hurt turns to bitterness and anger and more misunderstanding, with which we build walls of division. People go away hurt and angry not only at others, but at God, and build their own churches of me, where they will not be hurt.  Wrong response to be sure, but we don't want to be the one who sparked the fire of hatred and division.  So, let's stop sparking the fires by putting out our personal little fires of self-fulfillment, looking out for one another in love.