Why did the Lord refer to satan as a "serpent" in Genesis?

Because satan disguised himself as a serpent since serpents are the only creatures who satan , the idiotic fool who will die in the pit of fire and will burn and be destroyed , was able to decieve . Satan used to have emotions but through his own sin he became emotionless and UNABLE TO DO RIGHT . Satan is the epitome of evil . Feeling sorry for him is as ridiculous as feeling sorry for a disease . Yet you should feel sorry for bad people because caring about them is as justified and wonderful as caring for someone who has suffered a disease .