Yes, it is. It is a tradition of baying like savages at the torture of another creature. Dressing up in fancy clothes and ceremonialising the whole disgusting spectacle as 'culture', 'pagenatry', 'la fiesta nacional' does not make it any more permissible. Slavery and public executions were tradition, too.
And they were supported by the same class of people who continue to support bullfighting in Spain today.
They will die out, and will not be mourned by civilisation.
The dustbin of history awaits.