UPDATE: A reader in a comment below shows that I was wrong about my answer. But I am going to claim that I am also right, depending on which country you are in. It was inconceivable to me as I was answering this that such a thing could be permitted, so I didn’t double check the Novus Ordo rubrics in different countries, through my bad, my bad, my – like – totally bad.
I think this is a really BAD idea to have this as an option anywhere, but… they didn’t ask me.
That said, and with my mistake in mind:
From a reader:
During the reading of the Passion today, the choir jumped in at random moments to sing part of “What Wondrous Love Is This”. That feels wrong; is it?
What part of Say The Black – Do The Red don’t they understand?
I was unaware that the text of the song “What Wondrous Love Is This” was in the Gospel.
This strikes me as well-intentioned, but ultimately condescending to the congregation.
It is as if the people and priest who organized this had such a dim view of the intelligence of the congregation that they thought they had to spiff-up the Gospel.
The Gospel narrative wasn’t enough on its own.
Furthermore, it reveals an attitude of superiority in regard to the Church’s liturgical worship: we can do anything we want to it.
I recommend you send the priests and “liturgy committee”, Say The Black – Do The Red mugs.