Can you please explain the unpardonable sin ?

No, because it makes no sense.

It is when at the very end the truth is told and you say it is a lie. The is no more explanations no more waiting for the truth to appear. You can say what you want about the Son Of Man but the truth he speaks is not to be challenge cause it is the end. First Words Last Warning and Holy Writing tell these truth want to know the name that only he himself knows look these books up online.

jesus said all blasphemes would be forgiven man he further stated there is only one sin which would never be pardoned/forgiven and that was attributing the good works of the holy spirit to satan. in other words, giving credit for the miracles performed through the holy spirit to satan thereby blaspheming Him/not having faith in Him. he said this would lead to endangerment of eternal damnation. i will not interpret this for you please read mark chapter 3 verses 28&29. you'll find it in the new testament of the bible.

In my humble opinion, The unpardonable sin is one when someone knowingly and willingly causes harm or kills another.

Jesus said you can disbelieve in him all you want, hate him whatever and all that could be forgiven by just asking.

The one sin he stated that would never be forgiven would be "Grieving the Holy Spirit". What that means exactly I do not know but I would not recommend experimenting to find out.

Actually, if I am not mistaken, "Blasphemy of the Holy Spirit" is attributing works of God to Satan.

It's not a trap into which many fall.

Blasphemy of the Holy Spirit, which basically is not accepting Jesus Christ as your savior.