I believe that the scriptures teach that it is God's perfect will that all should be saved. It is God's permissive will that only those who positively respond to his prevenient grace will be saved.
The worst sin a person can commit is to reject the gospel message. But the Calvinist believes that the rejection of the gospel message by those who will perish is as much God's perfect will as the acceptance by those who will be saved. Any verses (such as 1 Tim 2:4) to the contrary are just not translated correctly, (Where have I heard that before?).
Yep, It seems that to some people "all is of God." All the evil is of God. All the Good is of God. Some are willing to admit that this is their belief. Others would rather lash out at the messenger rather than face the implications of their doctrine.