I read the lifesite article and Spanish articles on it. I cannot really see why the priests disapprove of the appointment, the only reason I seem to figure he might be opposed is because the Bishop is not a Basque nationalist, though he was born in the diocese and speaks Basque. It does not seem they oppose him because he’s orthodox, but because he does not reflect Basque nationalism or separatism or something along those lines. Lifenews gave the impress the priests opposed him because they were heretics, but that does not seem to be the case.
AntiChristian liberals and Spain hate the bishop for his opposition to abortion, gay marriage, and he seems to question evolution.