Hi George and buddhist,
Apologies if this thread already delved into this, I don't have the time to go through 13 pages at present, but...
I must agree with George's sentiments on this issue. Indeed, I think the Buddha's intentions were a bit different than you're thinking, buddhist. Even from the vantage point of the early Buddhist community alone. I agree Siddhartha's teachings were intention-oriented, but I think they did also point us to vegetarianism at least. Yes, the monastic discipline he described did allow some meats and fish to be consumed when the animal was not specifically killed for the monk or nun. The first relevant fact we need to remember however is that this was devised for a very different culture and time period than we know today. The early Buddhist monks and nuns did not prepare or grow their own food, they were required to passively beg (as per the Buddha's own code, and in a way consistent with preexisting Indian ascetic traditions) on a daily basis for their food. If they were restricted from eating meat, most of the food offered to them would have been forbidden, and they would not have survived as an order. So there was a practical concern in the allowance. Furthermore, the concept of generosity on the part of laypeople is another intrinsic Buddhist virtue. The giving of food to bhikkus was karmically important for laypeople, and not just a matter of supporting the monks and nuns. Placing restrictions on what they could give would therefore impair their spiritual practice. Ultimately, I think this allowance adds up to a compromise with the lay world and the times, and not a positive moral assertion. The allowance for meat if not specifically killed for the person was a way to allow laypeople to give what they had available, not a statement of the moral acceptability of meat consumption.
I think George is correct here with respect to a modern society as well. The argument that meat bought in a supermarket should be morally acceptable to a Buddhist since the animal was not butchered with the specific individual in mind ignores the clear logic that paying the butcher for the meat supports and encourages the further slaughtering of animals. It creates a demand for the violence and death of the animal, which is not at all dissimilar to the consequences of buying something specifically killed and prepared for you. And technically, monks and nuns did not purchase their food, so when the Buddha allowed the monastic discipline's acceptable meat rules, they did not financially support the killing of those animals. Furthermore, factory farming and its horrors did not exist in the Buddha's time, but it seems clear to me that we can easily interpolate his teachings to look down upon this institution.