Just as there are people you might find hold a similar understanding with yours on some things and not on other things; that kind of thing.
The books written about MAD will differ depending on what "understanding" their particular author holds to.
There are different MAD understandings represented on TOL.
Just as Tetelestai and, say, Interplanner, or I Am A Berean, will differ in their understanding of some things, though they generally basically hold to a very similar understanding, overall.
This really all boils down to two theologies (study of the things of God)....
1) The Reformed or Covenant, and all the different groups that has resulted in over the years.
2) Dispensational, and all the different groups that has resulted in over the years.
Both schools of thought are Protestant. They essentially hold to the same fundamentals of the faith. Unlike, say Mormons, Jehovah's Witnesses, Church of Christ, 7th Day Adventists - which are not Protestant.
Both the Reformed and the Dispensational school, are an attempt to organize their study of the things of God, into a way of studying out the who, what, when, where, why, and how, of things described within Scripture.
That is really all both schools of thought are - an attempt to organize their study of the things of God.
And within all the groups those two have resulted in, you will find people who take issue with anyone who does not hold their exact view, and are rather nasty about how they let one know.
