Israel is under intense pressure from a large portion of the globe after what has been described as a "massacre". One shouldn't expect Israel to be taking an unbaised look at their own behavior on a website seen throughout the world. They might not have physically altered the pictures, but they could very well have picked out the most flattering ones for display.
Israel has a lot to gain from those pics. Not saying that they committed a massacre. Just saying i am going to need independent evidence that they didn't.