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A couple of things.
Blue on blue refers to "friendly fire" casualties. Thus far, reports indicate that Israel has suffered more casualties (KIA) from their own fire than they have from Palestinian fire. This statistic belies Israel's claim that they are only utilizing precision techniques in an effort to strike only cambatants as do reports that they have struck UN "safe zones", the exact coordinates of which having been given to them prior to the attacks. Both examples seem to bolster the idea that Israel is itself, utilizing the tactics of terror in its war on Palestinians.
Secondly, I have known Glenn Greenwald since long before he started the Blog "Unclaimed Territory" or writing books. I can assure you that Glenn Greenwald is most assuredly NOT writing what he writes to sell more books, although that may be a legitimate by-product of his efforts as more and more people are exposed to the non-conventional wisdom often found on these pages (and I don't limit this to just the articles themselves). The style, tone, and substance of his works have not changed a single bit in the 15 or so years that I've known him and sparred with him on some issues. Greenwald writes what he believes, nothing more and nothing less.