This is just pure speculation on my part, but I suspect is that the true purpose of the attacks is to cripple online libraries, using Israel an excuse to stir hate and cause division in the left.
But why? What happens when you can post something online and then revise what you say some time later without any record that it was changed, or digital records, books, information etc gets taken down esp. in places where physical libraries become criminalized or dangerous to run?