The false shepherd is a hireling. When the hireling sees the wolf, the devil, coming, he flees because he cares not for the sheep. How the sheep react to the false shephereds. The sheep are the true Christians. In vs. 5 Jesus says that the sheep flee from the false shepherd because they do not know him.
Sheep recognize the voice of their own shepherd.
They flee the voice of a stranger. Christians flee from the voice of false shepherds because they know that false shepherd will only abandon them to the wolf, the devil. In vs. 2 Jesus tells us that the one who enters through the door is the shepherd of the sheep. Through Me if anyone enters he will be saved and will go in and out and will find pasture. True shepherds preach only Christ and Him crucified.