We once roamed the nether before it had become that evil red color. We were normal pigmen. Not zombies. The nether used to be full of life. The now red landscape used to be a colorful green place. Yet when the Endermen entered the nether everything became red and horrible! The Endermen would attack any mob that looked at them! The Endermen should have stayed in their dimension! Now all the pigmen have become extinct! But I used to look like a nice pigmen not a zombie!