Why the Front Doors are Red
In the earlier days of the church it was understood that a soldier could not pursue an enemy that had entered through the red doors of a church. The red doors were a symbol of refuge and sanctuary for all people who entered. To all concerned the red on the doors signified the blood of Christ that had been shed so that all who came to him could be saved. Anyone who passed through those doors was safe as long as they stayed behind them.
Over time, Christian people began to see the red doors of the church as symbolizing not only physical refuge and safety, but spiritual refuge as well. The blood of Jesus, and of the Church's martyrs, that the red doors of the church symbolized, would protect you from evil, both physical and spiritual. The red doors spoke to the world of holy ground that existed inside those doors, space that had been purged and made clean by God's Holy Spirit. Today people choose to paint their church doors red for many of the same reasons that churches did centuries ago.