I guess that you have never lived around Indian Country. Cultural practices are not judged by other cultures.
Murdering dogs who do not fight well? No dude it is cruelty and is not acceptable behavior.
Hopefully we advanced a bit from bear baiting and thorwing christians to the lions but some people make me wonder.
Indian practices, as you've put it, are carried out on reservations - property that was set-aside for the native American people as an area for the native Americans to govern and manage in accordance with their own cultural ideals and religious beliefs.
The urban areas of America's cities are not federally set aside areas for the inhabitants to govern as they see fit. They have to abide by the city, county, state and federal laws that have been passed in a democratic manner. Just because they don't agree with those laws, doesn't give them license to break them.
Forgetting for a moment that Michael Vick isn't a Native American, and that his dog fighting wasn't carried out on a reservation, or the inner city for that matter (his dog fighting took place on the property surrounding his suburban Virginia home), are you arguing that Vick's commercial dog fighting venture was somehow an expression of Vick's long-held religious views steeped in centuries of tradition?
Your argument is not very well grounded in neither history nor law.
Laws are