Forgive me for being 'ignorant'... but they COULD have had their little demonstration somewhere other than a highly cherished cathedral... now I don't think they deserve several years in prison, but it WAS disrespectful of them. Regardless of how they feel.
The punishment they are being given is totally unjust and unfair, they don't deserve what's happening to them. But they also were asking for it, just a little bit.