Why did God create Lucifer?
Well in Mormon lore...Jesus and Satan are brothers.
Lucifer was an Angel created to serve God who seeking to exalt himself above God was instead cast out of Heaven:
Isaiah Chapter 14
12 How art thou fallen from Heaven, O Lucifer, son of the morning! [how] art thou cut down to the ground, which didst weaken the nations!
13 For thou hast said in thine heart, I will ascend into heaven, I will exalt my throne above the stars of God: I will sit also upon the mount of the congregation, in the sides of the north:
14 I will ascend above the heights of the clouds; I will be like the most High.
15 Yet thou shalt be brought down to hell, to the sides of the pit.
For Democrats and Progressives to have a rallying point to fulfill his plan?
God created Lucifer for the same reason he gave man free will.
Why don’t you ask God?
Lucifer was originally created by God as an Angel. But then he rebelled against God and got thrown out of heaven with a third of the other angels, his followers.