Actually, it’s caused because they abandoned tradition which said “God says marriage is between a man and a woman”
It happened because we were silent when we allowed dress down Friday in our schools, wayyyy back in the sixties.
Actually, it started with abandoning Inerrancy in the 1920s. Abandoning the authority of Scripture soon followed. This is only the logical result of German Higher Criticism (of the Scriptures) that was popular at that time.
This put scholarship over the Bible (Man over the Scriptures) and has resulted in what you see.
In 1973, we, The Presbyterian Church in America (PCA) formed when Mainline Presbyterian church funded communist rebels in Central and South America with our tithes. We made a Pro-Life plan in response to the promotion of Abortion (another issue of the time) and went back to the Westminster Confessions of Faith and to the Inerrancy of Scripture.
We believe Marriage is Ordained by God only for One Woman and One Man covenanted before God.
Flee the Liberal Churches as fast as you can. The tide is rising fast - flee to the high ground quickly. For the days are coming when men will not listen to reason any more.