The 'Sea Shepherd' people have a history of intentionally injuring themselves and blaming it on the whalers...
See the southpark episode on the subject
In any event, at first it looked like the "batboat" was dead in the water, but close to the collision you can see that its moving forward, more or less matching the course of the whaling ship but at a slightly slower speed. Then they came together. It seems to me its only
not the environmentalists fault if they had no steering. Otherwise the collision is avoided if they merely veer right.
Hopefully Whale Wars won't make me watch 10 episodes of boredom before they get to this episode.
Edit: after watching it 3 more times, they were clearly on a collision course, but the environmentalist boat was moving forward and failed to steer out of the way. They may have even been steering slightly left. Regardless of who intended to collide, it was a perfectly executed crash in that no one got hurt and the small boat was disabled. Either the whalers wanted to ram them to stop the harassment or the environmentalists wanted some free pub and managed to get it without anyone getting hurt. Good clean high seas drama either way imo.