As is so often the case with the internet, once you start looking things become less clear.

I don't believe Peake quoted any source during her interview for her claim about the Israeli training US police to kneel on suspects necks. It seems her source was a blog post from 2012. Amnesty International then appear to have said that its report does not show any evidence of “neck kneeling” as a technique taught by the Israeli secret services, nor evidence that the Minnesota police force received training from the Israeli secret services.