Perhaps, if we persist, then when Jesus Raptures away His Church and they are witness to so great a miracle explained to them before hand, perhaps then they will immediately call upon His name and believe He is the only means to Salvation in their acknowledging Him, not holding up their filthy rags works.
I hope they do, and I suspect many of them will be gloriously saved. Praise God for that. They should be aware, however, that in my opinion, in the tribulation period, the cost of being a true Christian, as opposed to a fake Christian, but the cost will more than likely be a physical death sentence. Better late to the party, than not come to the party at all.