The argument against "evil", theists please come to the defense.

[Ryantology]

God cannot create square circles.

Then God is not all-powerful. Simple as that. Nothing should be impossible for a being with the pretensions to call itself all-powerful. If God exists and he is all-powerful, then the only reason suffering is 'necessary' is because God wants suffering to take place. If you dispute this, then you deny the omnipotence of God.

So, we have a paradox, and the only way to resolve it short of denying the existence of God is to deny that God is loving, caring or in any way sympathetic to humanity as a whole. At best, he picks people, with no apparent bias towards those who believe in him, to be the beneficiaries of capricious acts of positive effect.

In short, God cannot be all-powerful AND all-good. The world we live in contradicts this. That sort of God would not have let me suffer a paper cut because suffering would be anathema to such a being. It is to the presumably much less perfect me.