Western bishops wear mitres. There is no connection whatsoever between Near Eastern men wearing stylized fish mouths on their heads - that’s what your picture shows - and Christian bishops wearing mitres. There are, however, plenty of stupid, semi-literate twits who believe otherwise.
There are so many illuminati, and satanic decorations in the Vatican it's hard to know where to start. Please don't feel this is a personal attack against people with faith. It's not against you or any other of God's children.
It's against your environment, and the non scriptural rituals. If they define you, at least look around and see what you are made of.