The documents are almost certainly legitimate. Documents released by ITIC are, for all intents and purposes, the same as if the IDF sent them out. They work together and ITIC often publishes things before the IDF does, but it does not do so without at least the IDF's tacit approval.
The thing is that we don't need these documents to know Free Gaza's aims. Even though they are registered as a 'humanitarian organization,' in their own mailings they have made it very clear that they are not - and they say this explicitly on their own web site"