As others have said previously, as a cultural tradition it's up to the people of Spain to decide if they want to continue it or not. I don't think any more or less of Spain because of it.
I grew up in El Paso and a typical Sunday afternoon in my childhood included a trip to Juarez'
Plaza Monumental with my parents, aunts & uncles, grandparents and lots of cousins. It was a very festive atmosphere with lots of concessions and music, and we always had fun. And even for a pretty squeamish, animal-loving little kid, there was such an emphasis on the whole ceremony and art of it that it just didn't
feel brutal.
Before the fight, they'd ceremoniously introduce the owner of the ranch the bull was from and have a representative from the orphanage/charity that would be receiving the butchered bull afterward. I always think of that now at Spurs games when they present the Pizza Hut ball kid.
I never witnessed any "gangbanging" of the bull by the horsemen and the only person who ever had a sword was the matador. I even saw some bulls actually "win" the fight and be spared, supposedly to be retired as a champion.