For those who are still uncertain regarding the precise nature of the "peaceful humanitarian activists" who populated the flotilla, here are a couple of videos that should help make things clear:
In the following video, the IDF warns a ship in the flotilla against entering the blockade zone. Make sure to listen to the peaceful humanitarian reply given by the flotilla leaders.
The flotilla was organized primarily by two organizations, "Free Gaza" and the Turkish group IHH. Of the two, the IHH is the larger, and contributed the largest of the ships and the most passengers. The IHH is a radical antisemitic, anti-American Islamic Jihadist organization, that maintains ties with Hamas, Al Qaeda, and several other terrorist groups. Here's a brief summary.
Here is video of a speech given last year in Gaza by the chairman of the IHH. Listen to as much as you can stomach, and bear in mind that you are listening to the head of the single largest group that organized the flotilla.
It's not difficult to grasp what motivates people affiliated with such an organization.
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