Purely as a piece of art, I have no problem with it. I’ll leave it to others to say if it’s “blasphemy” (It probably is, but like the word, “racist”, “blasphemy is too easily used). I will say it has no place in a Christian Church.
If the message of the art is to equate the sufferings of a modern feminist, or of “women” in general, with the sacrifice of Jesus, it is indeed blasphemy, a kind of self-worship.
I’m not observant, and have no problem with it as a piece of art. A generation from now whatever passes for anthropology will be unpacking the intelectual proximity of this piece to the exhausted philosophy of Simone Beauvoir as interpreted by Andrew Dice Clay’s Madison Square Garden routine on some womens’ need to assume the role of martyr. Entire masters theses will be composed, no doubt. When it comes to expression, I’m in favor of letting people get it out of their system. Let’s you know how weird they are...keeps it from becoming a neurosis.
But installing it on an altar in a Christian cathedral...hard to offend me, but that would/does. Where are the Nigerian bishops when the Anglicans need them?