Here's an article I'd like everyone's thoughts on, as it seems to encapsulate the argument at least somewhat:
Acts 2:21 - Calling on the Lord's Name
And here's the passage of Stephen being stoned - he was crying out to the Lord in an audible voice:
"While they were stoning him, Stephen prayed, 'Lord Jesus, receive my spirit.' Then he fell on his knees and cried out, “Lord, do not hold this sin against them.'” Acts 7:59-60 I know this isn't regarding initial salvation, but wasn't he calling on His Savior . . . to save & forgive?
And isn't there a verse in Acts that says they found and persecuted Christians by those calling on the Lord? (I can't find this verse now - perhaps somebody can tell us where it is . . . unless I imagined it, then please correct me.)