I'm going to play devils advocate here:
We value the dog as a companion to man. I love my pup, and would do anything to protect him. I think it's safe to say that the dog is almost a sacred animal in our society. That video disturbed me, but it also just made me think of every other bleeding heart liberal propaganda that tries to play on my emotions. We shouldn't be making decisions that impact others by how we feel emotionally.
Look at what we do with cows. Cows are sacred in some cultures, and I imagine they wouldn't appreciate how we treat them and consume them. I don't want anyone to say that how we butcher cows is in any way "humane." It's efficient. In some countries dogs are consumed like any meat, cause, it's meat to them, not mans best friend. I'm protecting mine, and the ones I can help. I choose not to associate myself with people who abuse dogs and believe in our culture it's wrong to do so. But, that's our culture. Not theirs.
And, frankly, at least these dogs aren't transferring disease, attacking other dogs, ect ect as is a problem with overpopulation and excessive strays. In a jonathan swift(i think that's his name) point of view, these dogs aren't going to waste.
You can try to solve a problem based on your emotions, but you'll end up with 2 problems to our survival and well-being. I guess you can tell I'm not a socialist.....
Just playing devils advocate. Something to think about.