I agree completely. It's not like interdict has been removed from the list of canonical penalties or anything. Canon 1374 seems to apply to the situation, prescribing an interdict for promoting or directing an association that seeks to plot against the Church.
I remember reading the St. Pius X put a whole town under interdict simply for treating its bishop with insult. How much more deserving of interdict is this parish? It probably ought to be razed to the ground and the whole site exorcized.
Seriously! How can we get the ball rolling on this interdict? LOL
Kawaii...do you remember a FR thread about a similar situation happening in Russia? A RO church was used for some kind of disgusting display like this and the Patriarch or Metropolitan or whoever had it razed to the ground as I remember.
Maybe it would be a nice gesture of ecumenism for the Holy Father to do likewise here. ;)