I do not view those not support Calvinism as not being in the body of Christ, but would view them as those who are still somewhat ignorant as to what the Bible really teaches regarding salvation, as many of them still want to try to uphold what their group teaches even though disagrees with the bible..

As I was lost sinner, the Lord witnessed to me thruthe scriptures and some saved Baptists, God saved me, then attended Assemblies of God, to a Free Church, and now member in a solid Baptist church,and now HE has openned my eyes to the truth of salvation as per Calvinism...