They manifest physically. When they do, we take the physical sword the Lord commanded us to own (Luke 22:36) and stop them.
Today we choose the modern equivalent — a firearm.
There is a time for peace and a time for war — everything in its season. We use spiritual weapons to bring the gospel to a dying world. When a armed sociopath tries to kill us, it’s time to deliver effective fire.
If this is taken too lazily or sloppily you end up with something that looks exactly like the world.