Alvin Plantinga, it is true, gave a much heralded argument for compatibility. This was his "free will defense". But the argument relies on a good deal of suspect metaphysics. It is quite reasonable to doubt that the mechanisms underlying his argument are really (metaphysically) possible. Even sympathetic philosophers now conclude that the compatibility claim is unproven; Plantinga's scenario might, for all we know, sketch a possible world, but it might not. We don't know one way or the other.
As parenthetically noted above, some philosophers (e.g., Richard Gale, Quentin Smith, Jordan Sobel) challenge the alleged death of logical arguments from evil. They attempt to support the incompatibility claim anew, sometimes relying on inductive considerations more commonly associated with evidential arguments from evil. Nevertheless, most philosophers discussing evil as support for atheism are more interested in evidential arguments from evil.
