Amen Brother George!
Years ago I learned a valuable lesson. I used to go soul-winning on Saturday's with my pastor. I think he was the most godly man I've ever known, a terrific person, and smart too.
I remember one day we stopped at this house and a 30'ish lady invited us in. My pastor sat down with the lady and opened the Bible to show her verses on salvation. I sat quietly and observed. My job was to take care of kids and especially dogs. I used to laugh, my pastor said dogs worked for Satan, they will always try to distract you when leading someone to the Lord.
Anyway, no dogs or kids this day, but as my pastor showed the lady verses, a couple of times she said, "well, I don't believe that". Suddenly my pastor closed his Bible, stood up and very kindly thanked her for inviting us in. I was confused, because he had stopped short of leading her to the Lord.
When we got back out to the car, I asked my pastor why we had left so suddenly and why he hadn't tried to lead her to the Lord.
He said, "Didn't you hear her? She said she didn't believe the Bible.
If you don't believe the Bible you cannot be saved."
He used to also say, "Those convinced against their will, are of the same opinion still."
I learned something important that day. You are just wasting your time trying to talk to people who do not believe the Bible. The best you can do is pray for them that the Lord will open their eyes and mind to believe.
And of course, the Lord said,
Matthew 7:6 Give not that which is holy unto the dogs, neither cast ye your pearls before swine, lest they trample them under their feet, and turn again and rend you.
These folks simply do not believe God's word.