Overview of Luke 5

In Sunday School we have been studying the book, "The PeaceMaker," which has sturred up no small contraversary, even calling into question whether or not we as Reformed Baptist are in error in our thinking and teaching.
Is God sovereign and if so what does that mean?
Does God save and what does it mean to be saved?
Is salvation Monergistic or Synergystic.
Are we to hold to the Infralapserian Position or do we hold to the Supralapserian position.
Is salvation and preservation solely a sovereign work of God or is man free to save and/or keep himself.
What does it mean that man is dead in Tresspasses and sins?
What about Free Will?
Are we slaves or not?
What about Predestination?
Doesn't that make God responsible for evil?
Does this matter, or can we just agree to disagree and continue on without breaching these subjects.
Does doctrine matter, and shouldn't the primary concern be unity at all cost?
Is grace really necessary at all?
All of these question's have come up to some degree, as we have spoken and taught about all ove these issues and we clearly hold to the Biblical teaching and Reformed position on these matters.