@synergy
I would not call modern day fundamentalism Baptist churches the mainline Baptist of four to five hundred years ago, not even close ~ except for name only, you could not tell them different from the average Pentecostals, and many other groups.You left the mainline Baptists because of their premillennialism view?
Most churches, and I say most, were very Calvinist in their teaching back three hundred years ago, from the Baptist, Congregationalist, Church of England, Even Methodist (George Whitefield) along with the Wesley's started Methodism. A lot of little Chapels with no name were Calvinist in their teachings. This is not the case any more, in this age of apostasy.That doesn't explain how you gravitated to the particular Baptists and became calvinistic in your beliefs.