Read the verse again: “But what he did...”
He was slain for a positive act; there’s no statement asserting that his death was due to disobedience.
But see the question I put to Dartoid; you’re free to take a stab at it as well. (I hope he didn’t disappear. The Protestants seem to always disappear when I put a direct question to them.)
Were the Protestants who shunned birth control from the time of Martin Luther to the time of the 1930 Anglican Lambeth Conference also incorrect in their interpretation of this passage? (Were they too, “living under the Old Testament”?)
Read the passage again.
The Roman Catholic lives under the false presumption that every sex related act has to have a chance at child birth.
NFP attempts to get around that.
It's contraception just under another name.