>>Christianity recognizes the only unforgiveable sin is that of rejecting Christ. All other sins can be forgiven through Christ.<<
100% Wrong.
I thought your Protestants knew you Bible. I guess I was wrong.
Try again.
Rejecting Christ can be forgiven??
It is you who have made the error. Think about this: it is The Holy Spirit Who woos the unsaved and by responding to His calling we find The Grace of God in Christ. Denying the calls of the Holy Spirit leaves you irreconcilably lost. How many hear the still small voice and scoff at it as a childish conscience, a bad bit of meat at dinner, or a gut churning in need of an antacid? How many haughtily reject the still small voice when they are shown their error in the religious institutionalization which has captured their soul? How many reject so much of what GOD tells us in The Word, so they can continue to believe they eat the Word Made Flesh Who dwelt among us? How many reject The Holy Spirit wooing because the devil on their shoulder tells them it doesn't include something they must do over and over, daily, to be worthy of God's Grace in Christ.
Read 1 Cor 5:3-5 ... the one doing wickedness was to be put out of the fellowship SO THAT his flesh could be taken by satan yet his soul remain saved.