Why do you have such a big problem with free will?

Luther:

Because you make humans ‘neutral’ because of it, as if there were a middle position between good and evil. That is a false image, a fiction that people have invented because they do not know how things really are. The reality is as Christ says: ‘He that is not with Me is against Me: and he that gathereth not with Me scattereth’ (Luke 11:23). He does not say: ‘He that is not with Me, is also not against Me, but is neutral in the middle’. Because if God is in us, Satan is not there and then we want nothing but good. But if God is not in us, Satan is there for sure and we want nothing but evil.