Well....I think there may have been some legitimate questions about Fr. Josemaria Escriva of Opus Dei. I've read some disturbing things, about him (he had a terrible temper and could be viciously cruel to subordinates), his organization (regarded by many devout Catholics as having cultlike tendencies), and his canonization process (the only witnesses to his "miracles" were Opus Dei doctors) from respectable, Catholic sources. At the very least, he was not as obviously deserving of the honor as Emperor Karl.
As I said in my previous post, I wish that there had not been so many beatifications and canonizations recently due to lowered standards; it would make the Emperor stand out more if this were a rarer event, as it used to be.
I don't know much about Opus Dei, thought having a short-temper is not at all uncommon among the saintly (Padre Pio being a fine example). I guess I always assumed that if the Spanish republicans tried to kill him, he must have been doing something right.
Everyone has their supporters and detractors, I've never read enough about Escriva to be definite one way or the other.