No, you're absolutely wrong on this point of the cuts and pastes. It is PLAGIARISM as well as coyright infringement. Copyright Infringement is the cause of action, and copyright is the basis of intellectual property right, with respect to any action that Peters would make, if she so elected.
But PLAGIARISM is based on the duties that Dershowitz has, implicitly, to the academic community as a whole, and expressly to his University in particular.
Finkelstein DEFINITELY proved the plagiarism, even if Harvard elected to take no action.
So? He DID NOT PROVE that Peters' work was "full of lies" as he claimed. It was a diversion to attack Dershowitz.
If Joan Peters wants to follow up on the accusations of plagiarism that's her business, not Finklestein's.
If Finklestein claims that Joan Peters' work has no credibility, let him prove it instead of throwing out red herrings.