There is no mystery in the universe as profound and troubling as the problem of evil. Many who are atheists will cite this very problem as the primary reason for not believing in God.
On an intellectual level, an Arminian can live in a quiet truce with other Christians over this issue because on an intellectual level, both sides generally accept that much of the problem is indeed a mystery. But on an emotional level, the question goes too deep.
On an emotional level, I fear the Calvinist and the Arminian are in completely different universes when it comes to dealing with pain, suffering and evil in the midst of human experience. (More)