No, unbelief done in ignorance is forgivable, but to continually resist the HS convicting power by hardening your heart through the deceitfulness of sin to the point of searing your conscience…is not. Both unbelievers and believers can commit this unforgivable sin that has eternal consequences.Since we are condemned because of unbelief does it not follow that we should turn from our unbelieving mind and not our sins? We are not condemned because of sin. Repenting of sin prior to salvation is meaningless because God has already judged Jesus for them already. Sin has been dealt with. Changing your mind about Christ is repenting which is salvation. We partake of this forgiveness and salvation when we believe in Christ.
How does this all tie in with the sin to blaspheme the Holy Spirit? Luke 12:8-10 has established a connection between denying Jesus and to blaspheme the Holy Spirit. To deny or renounce Jesus is to blaspheme the Holy Spirit. All sins have been paid in full by Jesus. God is no longer imputing sin to anyone’s account. All sin, but the one Jesus said shall not be forgiven… If you deny Jesus you cannot partake of this “paid in full”, salvation. Believing is a non-meritorious act and requires nothing of us except a change of mind. Unbelief in ignorance Jesus paid for, but those who persist in unbelief will never receive the pardon that is yet possible for them. It is “a state of hardness of the heart in which one consciously and willfully resists or renounces God’s saving power and grace” (Holman Bible Dictionary, p. 198). To again quote the Expositor’s Bible Commentary, Jesus is “not speaking of an isolated act, but a settled condition of the soul” (vol. 8, p. 645). Dr. Gerhard Kittel, in his classic Theological Dictionary of the NT, said, “It denotes the conscious and wicked rejection of the saving power and grace of God towards man. Only the man who sets himself against forgiveness is excluded from it” (vol. 1, p. 624). Your guilty of the eternal sin which has eternal consequences. 2 Cor 5:19 has established that all sins are paid for by Jesus and sins are no longer being imputed unto anyone’s account. But there is one sin that is not included and does not have forgiveness in any age, to deny or renounce Jesus is to blaspheme the Holy Spirit or remain in UNBELIEF! There are those who say we have to repent of our sins in order to be saved. No, we have to repent ( Change our minds) only of the thing that makes us unsaved, and that is unbelief.