You guys are weird.
Of course evil is God's fault.
It's certainly not my fault. And if you don't pick God then evil might end up being your fault. And then you'd have to do something about it.
It is my view that all human to human evil is our fault but that we cannot help but do that evil to each other.
Much has been written to explain what I see as a natural part of evolution.
Consider.
First, let us eliminate what some see as evil. Natural disasters. These are unthinking occurrences and are neither good nor evil. There is no intent to do evil even as victims are created.
Evil then is only human to human.
As evolving creatures, all we ever do, and ever can do, is compete or cooperate.
Cooperation we would see as good as there are no victims created. Competition would be seen as evil as it creates a victim. We all are either cooperating, doing good, or competing, doing evil at all times.
Without us doing some of both, we would likely go extinct. This, to me, explains why there is evil in the world quite well.
Be you a believer in nature, evolution or God, we should all see that what Christians see as something to blame, evil, we should see that what we have, competition, deserves a huge thanks for being available to us.
There is no conflict between nature and God on this issue. This is how things are and should be. We all must do what some will think is evil as we compete and create losers to this competition.
Theists have developed Theistic Evolution to explain what I briefly showed if you think the notion compelling.
Regards
DL