Holy Trinity Evangelical Lutheran Church-Springfield Georgia
The interesting thing about this traditional red door on this church is that it was installed years after the beginning of the congregation in 1912.
The photo below shows a window in the front center and the entrance doors are on the front corners. The separate doors were common years 
ago because the men entered and sat on the right side of the church, and women entered and sat on the left side of the church.
Here is what is written on stjohnscharleston.org/ about Lutheran Churches and red doors:
The closest most South Carolinians get to Lutheranism is passing by a Lutheran church and the red door to its sanctuary.
Why do Lutheran churches always have red doors? According to Dr. Richard C Hoefler, dean of Christ Chapel at Lutheran Theological Southern Seminary, the use of the red door is “relatively recent.”
Not all Lutheran churches have red doors, but they have been popular in the Southeast for a few decades. Hoefler said Lutherans view red as a symbol of the blood of Christ.
Christians, Hoefler said, have “entered into worship, into the presence of God, through the blood of Christ.” In the earlier history of the Christian church, the doors often had “the whole life of Christ carved on them. That symbolized that by the deeds of Christ, we enter into worship.”
Lutherans view worship as sort of “an inhaling, exhaling process,” Hoefler said.
“We come out of the world and into the church. We are called into the church by God, where He equips you, and then we are sent out again” to witness and minister.
The State newspaper, Columbia, South Carolina
Sunday, November 6, 1983
That’s interesting. I never knew that about the red door.
Good post. I learnt something new. Thks😊