Then there is no such thing as an "unbeliever" according to your pov, there are even those who believe in Evolution (Atheist for example). Your are being ridiculous and I "believe" you know this. We are commanded to preach and persuade men, we have no idea who are the elect and when the bible speaks of "unbelievers" it is specifically speaking of those who do not believe the gospel of Jesus Christ. Matters not what ever else they believe in. Paul was an "unbeliever" for many years before Jesus Christ stopped him in his murderous tracks.
Seriously....are you that dense. 1st don't make assumptions
about my statements....cause your wrong. Paul believed in a false and corrupt religion. Not in The True God. So how did he believe.....falsify! Christ tells you that nothing could ever make these type believe in Him. The only hope for them is a direct intervention......and I'm not Christ.