I don't like whale hunting, I think it's abominable...
That being said, there's something people have to understand.
Whalers ar not doing this to be intentionally cruel, most of them are not anyway. This is how their families have made a living for perhaps hundreds of years. This is what they were raised to do. They know no other way of life. And are not even aware that they need to look for another way of life.
Eskimos are in a similar "boat", no pun actually intended. They have lived for thousands of years hunting seals and walrus and whales. To them it's not cruelty, it's a way of life and a way to eat. Let's face it, if you get up inthe Aeleution chain, there's not a lot of farmable land, Cattle is strictly out of the question.
So, talking about banning whaling is all fine and dandy, but it won't solve the problem. These people are not working 9-5 jobs, they are just living their lives.
If you really want to eliminate whaling, you can't do it by attacking the whalers, not unless you want to commit several cases of genocide. If you want to eliminate whaling, attack the market for whales. In the case of the Japanese whalers it would be a case of getting the Japanese to pass laws forbidding the sale of whale "products" and actively enforcing those laws with massive fines.
For the Eskimos, I'm not certain how you could stop them without killing them off. Those people are sometimes without contact for months on end, and they live off of whatever they can.