there is no way you can present holding a controversial referendum as worthy of a jail sentence at all, let alone 15 years. "broke the law"... i mean, crossing the street when the light is red is "breaking the law". buying weed is "breaking the law".
it is a provocative heavy-handed foolish move by the Spanish Supreme Court, that will only serve to inflame tensions, as it now provides an air of martyrdom.
it's all thoroughly unnecessary and gratuitous. it would be enough to say "well that referendum result doesn't count, sorry. nope." and you'd have a bit of protest and another "illegal" referendum every few years, but you wouldn't be feeding the popularity of the Catalonian independence movement.
it was a stupid move. hubris appears unattractive to the global lens.
mind you, I couldn't have given 2 hoots about any of this, just reporting on how it appears on the world stage.
So yes: it actually was a case of stealing millions.