Pardon my interjecting, but when reading your forthright sentiments, I came across, "The only way it would be possible for a Christian to lose his salvation and the promises of Paul/Christ to be true is if a Christian has the Holy Spirit in hades". These two scriptures then came to mind:
Psalm 139:7-8 King James Version (KJV)
7 Whither shall I go from thy spirit? or whither shall I flee from thy presence?
8 If I ascend up into heaven, thou art there: if I make my bed in hell, behold, thou art there.
Revelation 1:15 King James Version (KJV)
15 And his feet like unto fine brass, as if they burned in a furnace;