I looked up a video with an actual Dutch SWAT team and their uniform looks different. The one in the picture is pretty derpy, and they're carrying what looks like tiny medieval shields. I'm not convinced.
Edit: talking about this picture: http://cyberbunker.com/web/images/swat-bunker.jpg
Edit2: I think it's more difficult to determine if it's real than I thought.
Light could be coming from the top (around midday) and be blocked in arbitrary parts by the trees, so one part of the place gets light from the right, while another gets it from the left.
I think they shopped the photo to illustrate their story -- they’re not claiming it’s genuine I imagine (after all, apparently it took place while they were asleep).