I think that what is being lost in this conversation, but is incredibly apropos, is that the building that was defaced is not the mission. It is a modern-day replica. So the tagger accomplished pretty much only one thing: forced a strapped State Parks office to shell out money to paint over his/her thoughtless action.

There is no symbolism in his/her action. The building was not built by the Catholic Church for enslavement of native peoples. It was built by the "community" (statewide and local) in the relatively recent past to be a learning tool. He/she might as well have just defaced postcards- it would have cost you and me (taxpayers) a lot less.