If you never noticed most of today’s “Christian” churches are very corrupt. Those who are anti-Christ have snuck in unaware and have been slowly changing the doctrine of the churches over the years. This has especially happened in the Christian colleges and preacher schools. Your preacher was likely trained this way unaware.
Your church in the 1950’s would likely disfellowship your church today. The membership have been trained to take what the preacher and society say over scripture. You can show them book, chapter and verse and they will not care. Find the oldest audio or print sermons or lesson books your church has and go through all that you can. If any of it offends you then you will know there has been change.
Your church now supports and helps those who hate Christ. It does this through false doctrine, false history and the very slow changes that have taken place over the years. Your church is no longer a threat to the enemies of Christianity.
Ye are the salt of the earth: but if the salt have lost his savour, wherewith shall it be salted? it is thenceforth good for nothing, but to be cast out, and to be trodden under foot of men. Matthew 5:13.