This takes place in the Phillipines and has been going on for decades.
Yes, it's been outlawed by the Phillipine government, but when has that ever stopped people from fighting animals and betting on the outcome?
Every country has illegal animal fighting going on, so none of us have room to point fingers. Cock fighting and dog fighting are still very much a part of the seedy side of the U.S. Even though they've been outlawed.
Heck, what about bullfighting and the running of the bulls in Spain? Both of those are still legal, although with the running of the bulls more people than bulls get hurt.
Bullfighting is considered a 'tradition' with the Spaniards, and although I find it distasteful, it's a legal sport. Different countries have different ideals, and none of us are going to change that.