Have we failed to follow Paul's instructions to avoid in-fighting?

Paul says to avoid quarreling in his letters to Titus. Have Christians failed at this, considering we have 45,000 denominations ? >**9**But avoid foolish controversies and genealogies and arguments and quarrels about the law, because these are unprofitable and useless. **10**Warn a divisive person once, and then warn him a second time. After that, have nothing to do with him. **11**You may be sure that such a man is warped and sinful; he is self-condemned. - (Titus 3:9-11) NIV