How in the world do you know what "it" meant in "it is finished"? There is a whole host of options.

It points to the work, finished, as far as options, He does not provide any.

Why would you purposely ignore the Romans 4:25 verse?

Rom 4:25 Who was delivered for our offences, and was raised again for our justification.

How many times was He delivered for our offences, by the work He performed ,of the Spirit before..... by an act of God ,God declared men free from guilt and acceptable to Him.(Justification)

Remember the tokens used to show a dead body point to a finished work, just as the lamb in the Old Testament anticipated this finished work.

Joh 17:4 I have glorified thee on the earth: I have finished the work which thou gavest me to do.

As far as Bizarre, those who claim it was not finished, and fall away by saying; He must crucified afresh each time they eat the bread and drink the cup, which speaks, teaches ,shows that "Spirit life" has been given perfectly/completely, expose Christ to public shame, as if the Spirit profited nothing and the dead flesh and blood that poured from His side, out into the ground, returning back to the dust from where it was taken ,counts for something also, other than a demonstaion of the lamb of God, slain from before the foundation of the world..

As far a the sentence structure, I am sorry and agree, I do need to work on that, perhaps I should take a class.