Patriarchal in the post modern sense or Biblical sense?The question is self explanatory.
Christianity developed within a patriarchal culture, and we see some of those cultural assumptions in some of the early Christian writings. However, Christianity itself does not need to be patriarchal. In fact, we see in the New Testament writings some ways that Jesus and early Christians broke away from the patriarchy of their culture, moving instead towards a community in which Christians are commanded to love their neighbors as themselves.
Biblically as per God's design men are to be head of the household yet are equals in union with their wife. For example Paul says the woman owns the husband and the husband the wife (1 Corinthians 7:4). It's a complementarian relationship.Either or both.
If you are referring to the priesthood, then yes in Christianity the priesthood is restricted to men. This is largely due to Christians not believing that they know more than God. Jesus selected only male apostles to serve as the first bishops, despite the existence of priestesses in contemporary religions and despite some of the more prominent of His followers being female. I guess you can argue that He was restricted in His choice due to the history of a male priesthood in Judaism, but that history was due to the law that God Himself gave to Moses so such an argument would in effect be arguing that God wasn't able to choose to allow women to be priests because He himself had set up a precedent that prevented it. In light of God's eternity this viewpoint is absurd, so Christianity has come down on the side of a male priesthood.
Priestess is the feminine form of priest. Why is that offensive?Not all denominations restrict the priesthood (or diaconate or episcopate) to men. Some of us recognise that God calls whom He wills, men and women both, and that this is a good and healthy thing for the church.
Calling women who are priests "priestesses" is inaccurate and an insult. It would be polite (and avoid running foul of CF's flaming/goading rules) to avoid that term. (Edit: sorry, I read more carefully and just realised you only used that term of pagans. People often call women who are Christian priests "priestesses," and it's a bugbear of mine).
To answer the OP, Christianity does not have to be patriarchal, but as it has generally been lived out in patriarchal cultures, it is very difficult for us to ignore or remove all patriarchal elements of thought and practice now. Gradually we are overcoming the most harmful.
Priestess is the feminine form of priest. Why is that offensive?
To my ears, it suggests 1) that female priests aren't real priests, they're a different category of clergy and 2) that female priests are a pagan intrusion into Christianity, because of the association of the word "priestess" with assorted pagan religions.Priestess is the feminine form of priest. Why is that offensive?
Priest is a male term. Priestess is the female term.Because "priest" is the accepted term in our denominations, priestess is not.
In our tradition, "priest" is a gender-neutral term, and "priestess" is a female-specific term.Priest is a male term. Priestess is the female term.
The question is self explanatory.
Priest is a male term. Priestess is the female term.
You didn't post any scripture from the New Testament which substantiates the claim that Christianity is patriarchal. You are tacitly implying that Christianity is anti-women. If you can find one Bible verse in the Gospels or anywhere in the New Testament that is hostile towards women and supports the ridiculous concept that men should rule over women, please do so. Hint: no such scripture exists.
Mercifully, no one has suggested "bishopess" yet.