I would begin by pointing out that a review of a science book, is not really the place to attack the author's politics. I'd also mention I know someone who thinks Zionism is Naziism, wants to blow up the US government, and various other nasty things .... but I still acknowledge he is pro children's rights. To say someone who supports Israel and the US, must be against children, is completely dishonest.
Anyway, to see why it's a blood libel, I'll translate 5 bits:
At the same time he appears to be a supporter of forces that are today turning children into victims.
"Turning children into victims" means hurting and killing children. The forces, we soon discover, means mostly Israel and a little bit the US...
I speak of Palestinian teenagers who are used as human shields in Israeli military operations against a civilian population.
The Jews kidnap teens, treat them as sub-human, and get some killed, to further their operations to murder civilians.
I speak of the more than 20% of Palestinian children who, according to a UN report, are suffering from acute malnutrition.
The Jews starve Palestinian children (or maybe distribute pamphlets with false nutritional advice).
I think of the Palestinian teenager from Jenin who said on television: "I have never seen, in my whole life, a single good day."
The Jews make life as a Palestinian hell.
I speak of the 2000 excess deaths per week of children in Iraq as a result of our economic blockade.
The Americans murder over 2,000 Iraqi children per week.