The topic of perpetuating negative stereotypes disgusts me far more than the casual genocide-advocating, which I didn't take seriously anyway. Not that I'm going to make a big ruckus about either for the record
Yeah, how dare he imply that just because a majority of people voted to keep it, that's outrageous. You might as well say that Brits voted to leave the EU!
For something being done for a long time, you got three problems with getting rid of it.
1) Tradition. Humans, everything else being equal (i.e. if 2 and 3 don't matter) just like to have things stay the same. It's comfortable, even if the actual thing itself is UNcomfortable. Similar in sentiment to "better the devil we know."
2) Money. Both in terms of cost to change, and if any real or percieved economic benefits come from the tradition. Such as tourism money, or bull breeders and wranglers losing their job. That's the kind of economic perceptions, "Oh what'll they do if we get rid of bull-fighting!?"
3) Cultural pride. "It's just a Spanish thing, you wouldn't understand!" If it's the only place or one of the only places that does something, even if that's lack of spread is for a very good reason, there's a sort of perverse pride in keeping doing it, even if you yourself don't like to do it. "Sure, I don't go to the bull ring, but I did once when I was a kid, it's just the Spanish thing to do, you gotta at least once." That kind of sentiment. Doesn't just apply here.
Given those three, you need a loooot of effort to push over those and/or argue against them, before a tradition is done away with. It's been done, there're plenty of traditions both absurd and horrid that are just... Not done anymore. But they took time and effort and a couple of die-offs of generations in some cases in order for them to kick the bucket.
It's not a "they're terrible people because they voted to keep it!" At worst, it simply hasn't risen, consciously, to "This is actually a HORRIBLE practice!" levels to offset the three-prong support it still has.