To blasphemy against the Son of Man is forgivable
Jesus as a human being knew he would be slandered and mistreated but forgave those who mistreated him
To blasphemy against the holy spirit is not forgivable
Jesus taught God’s moral principles.
People who disregarded this truth would continue to face the harsh reality of the consequences of choices based on a false foundation, even if they could be forgiven this could not erase the continued consequences of their ongoing bad choices based on a false sense of reality.
Jesus was persecuted for doing what was right. When we live to give and receive honor to and from our superiors even if it means moral wrongdoing we can not do the will of God. Society praised many wicked things and to always do what is right does not always result in honor. Sometimes the only way to receive honor is to do what is wrong.