As I listened to Issues Etc. on closed communion, I heard the message come through loud and clear...we must be in lockstep on the smallest of doctrines, or you are a false teacher.

The speaker also added that the reason for closed communion is that those who do not believe in the "real presence" of Christ in the elements are not able to "discern the body" - Lutherans defining "the body" as the presence of the body and blood of Christ in the communion elements, other Protestants defining "the body" as being able to discern whether or not the "self"/person partaking of the supper is a part of the body of Christ (the church).

I cannot see that. Scripture tells us to examine ourselves, it does not tell the church leadership to examine the flock.

The "selfish" reason I cannot see it is that I will not belong to a congregation that would deny my parents access to the meal that Christ gave us, because they are not in total agreement on doctrine.