Half don’t seem to be biblical Christians
The Holy Bible clearly condemns same-sex sexual relationships as evidienced by Romans 1:25-27. And not only does Matthew 18:15-17 show us that Jesus taught that a church is not to tolerate unrepentant sinners sinners in its congregation, but 1 Corinthians 5 is an example of an unrepentant sinner who should have been expelled from that congregation.
Given the Bible’s clear stance against same-sex sexual practices and intolerance with respect to having fellowship with such people, I question if the half of the church that knows that something is wrong with homosexuality has even read the Bible.
Yup. Half of them don't seem to be Catholic.
Basic catechesis is still very necessary, despite great new resources like Catholic Answers.
All the pastors have to do is place a link in their bulletins, and let the internet do the heavy lifting.