Truly I tell you, people can be forgiven all their sins and every slander they utter, but whoever blasphemes against the Holy Spirit will never be forgiven; they are guilty of an eternal sin.” He said this because they were saying, “He has an impure spirit.”
Mark 3:28-30 NIV
In the end, Jesus will decide what's "unforgivable". Not you or any man.
Truly I tell you, people can be forgiven all their sins and every slander they utter, but whoever blasphemes against the Holy Spirit will never be forgiven; they are guilty of an eternal sin.” He said this because they were saying, “He has an impure spirit.” Mark 3:28-30 NIV
https://bible.com/bible/111/mrk.3.28-30.NIV
No. I'm right. It's what Scripture says. I got my info from the source.