When Holden is putting the cross together inside the task force headquarters he uses a cordless drill to secure the screws. There were no cordless tools available at that time.
(At around 51:50) While Holden is running toward the church, a CNN van is seen in the background. The logo is their modern red logo, but from 1980-1984 their logo was black.
No one in Atlanta has the money to buy four pieces of lumber nor the skill set to nail them into two crosses.
There is a female Lutheran chaplain, but they keep referring to the Lutheran pastor as 'Father Monahan', which is Catholic terminology.