Sorry. Klein has no beef. He stated he was quoting a Reuters report. Crowley stated she was quoting a Reuters report. Klein does not own what Reuters reported. Reuters does.
For someone to own intellectual property, he has to have title to it, as its author or from its author.
There is an amusing case about how the copyright trolls at Getty Images are getting their asses sued off for attempting to claim copyright on something that was in the public domain. Photographer Files $1bn Copyright Claim Against Getty Images
Klein states Reuters said something, then he explained what Reuters said with interpretation. Crowley copied his paragraph with sentence structure and content, which was unique to Klein. She tweaked a few words and apparently didn't put his book and pages in the bibliography.
That is plagiarism and it shows extreme laziness for profit.