First, they are not dolphins.
Second, that is how they feed their population.
Third, tell me how it is horrible for them to do this once a year to feed their entire population when we keep our animals in cages their whole lives, pump them full of drugs, then slaughter them. At least the Faroese catch animals that got to live free for awhile and then slaughter them as quickly as possible.
Finally, the Faroese are not a threat to the whales' community in a long term sense. It is sustainable and has been for hundreds of years, maybe longer iirc.
They don't want McDonald's. They want what their people have been eating longer than this country has been around and their fishing is sustainable. I personally found the Whale Wars people to be horribly wrong on that one.