Maybe you should learn something about them before commenting: many byzantine Catholics are hostile to the Roman Catholic Church. This one probably is.
Hate to tell you this - but he is yours to deal with, and he is in communion with you, like it or not. I can't speak to whether he is fond of Rome or not - but the things he says are consistent with the more extreme stuff that has been emanating from the Vatican lately.
I can only make my conclusions from there.