I'm not a christian, but I grew up in a Baptist household, so I have at least a passing understanding of the Bible. Lemme know if I got any wrong.
If I'm understanding the bible correctly;
God Created heaven and Earth, Including Mankind and Angels
God is all-knowing and all-powerful
Relevant to this discussion, God created Lucifer and all the angels who sided with him.
God made Man in His image, and ordered the angels to serve them.
Lucifer, prideful of his own beauty, and envious of God's (at least perceived) favoritism of Man, and of God's position, started a rebellion in heaven and was/will be cast down into the lake of fire(aka Hell).
lucifer later tempted/took the form of the Serpent in the Garden of Eden and tempted Eve to eat of the Tree of Knowledge.
my conclusion: God, with full knowledge of what lucifer would do/become created him and set him on the path that led to his downfall, and to the Sin of Mankind.
Or to put it more simply; God created Sin through his foreknowledge of what Lucifer would become.
I'm not trying to start a shitstorm here, but this is the logical conclusion that I find myself at.
Any Christian pedes wanna poke holes in this for me?
better? none, sadly.
Alternatives that occur are that
God created lucifer to 'purge' Himself of evil, but I'm pretty sure that goes against Judeo/Christian doctrine on multiple fronts.
God had a blindspot when it came to Lucifer, but that contradicts the whole All-Knowing thing....
God believed that Lucifer would be able to overcome his pride and envy, but again, all-knowing.
Lucifer thought himself over the Heavenly Father and managed to take 1/3rd of the spirit children with him when he was cast down to earth. For his error of hubris, neither he nor his followers would ever attain the flesh, and never share in the resurrection to come. But they would plague mankind out of revenge-thus, there are demonic possesions. J/S