I've read many of their remarks in just this thread. Perhaps it isn't stupidity. Perhaps, think of their identity in their name, they've just been following the wrong teaching for such a long time that when the truth of God in the Gospel is outlined properly, they cannot comprehend it. Because for so long they've been led to believe the wrong thing.
How many Calvinist members were brought into the church as children, grew old and died ever being a Calvinist? Think about that one.
Very sad indeed.
Maybe that's the case. It isn't stupidity. It's obstinate rejection of right teaching due to prolonged submersion into the wrong one.
I always say, as long as a person has breath they are able to change their mind. Pray that Christ removes the blocks man has put on people who follow false teachings. As long as they have breath...