Paul is the best example here to answer this question….Paul, a devout Jew persecuted Christians and blasphemed as well. Whether his blasphemies were of Jesus or the Holy Spirit…he did not know what he was doing…he received forgiveness.
GOD is the final authority….and as his WORD says,
Romans 9 reads:
“15”: For he saith to Moses, I will have mercy on whom I will have mercy, and I will have compassion on whom I will have compassion. …and
“18”: Therefore hath he mercy on whom he will have mercy, and whom he will he hardeneth.
God is still GOD and “With God ALL things are possible.”