Those who believe negotiating with Evil will restore some sort of harmony or resolve a timeless chasm are ignorant, arrogant, and foolish.
Evil does not need you to go all the way to achieve its aims. Halfway is more than enough for Evil because halfway represents a willingness to mediate and mitigate, and this willingness reveals you no longer see Evil for what it truly is, but rather for what it is not.
Here's the trick - Evil urges you to compromise so that you may be compromised.
Evil knocked at the door. You answered, invited it in, and made the necessary accommodations. Don't be surprised when Evil decides to stay long after you have firmly asked it to leave. On the other hand, you might grow fond of your little houseguest and ask it to remain with you forever.
Strange things tend to happen when you are fooled into believing you have some sort of moral obligation to seek reconciliation with the irreconcilable.