[BRUTUS.] Let us be sacrificers, but not butchers, Caius.
We all stand up against the spirit of Caesar,
And in the spirit of men there is no blood.
O, that we then could come by Caesar’s spirit,
And not dismember Caesar!

Why is this passage an example of verbal irony?

Brutus wants to stand up to the spirit of Caesar.
Brutus wants Caius to be the one to kill Caesar.
Brutus does not want to be a butcher but has to dismember Caesar.
Brutus is later dismembered by Caius.