Wow, the end of western civilization is near... I did not see anyone mentioning the effects of this unjust tradition on the animals themselves. These animals are not supposed to be like this, running through the streets in fear and putting people's lives in danger, and striking out with their horns in self-defense. Remember, if you do this, what goes around comes around. It is for you to discover just when, how, and what circumstance it will manifest in.
Nic, you pointed at something, the adrenal rush of the experience. It seems to be that the world is full of thrill seekers looking for sensual pleasure. Like people are #1 about money and #2 about thrill-seeking and putting what really needs to be done right as #3 and their spiritual experience at #4. However I assume that many Spaniards are religious, but their perspective of animals is colored by their Abrahamic framing of the religious experience.
Hmm, money is definitely a focus for a lot of people in the Western world, but I think it's more of a means to an end than a pure pursuit of greed, for most people.
Thrill seeking and spiritual experiences are not mutually exclusive. I'm personally not much of a thrill seeker, but I do seek out new experiences and I have been sky diving. To me, it wasn't honestly a big adrenaline thrill type rush. It was an amazing experience to fall freely through the air from so high up though. I'd liken it to more of a spiritual thing than thrill thing, for me personally.
Spirituality is something different for every person. What we want to do with our time on Earth is something that each of us has to choose for ourselves. My philosophy is such that people can do as they want so long as they don't impede on the freedoms of others.
As for the bulls, nature is brutal. How we treat our food is pretty crummy sometimes, but all animals play with their food. It's nice to think mankind should rise above our natural instincts, but what are our instincts if not natural?
In regards to the slaughtering of the bulls afterward, at least we're eating them and not wasting the food. We slaughter animals in huge numbers all the time (how many billions of chickens do we kill annually?). Only the vegetarians among us have any right to speak against the slaughtering of the bulls.
I do not condone the mistreatment of animals in any way shape or form, but I do accept that it happens in civilized culture, and in nature. The running of the bulls is basically a ridiculous event based on a weird tradition. But, I don't think it's horrible mistreatment of the bulls though, to let them stampede through the town one last time before we eat them. Their brethren get sent to a factory and don't get that final stampede before we slaughter and eat them.