You are absolutely correct, except the Marxists infiltrated back in the late '50's or early '60's.
This is indeed the poisoned fruit.
Read up on the World Council of Churches or the National Council of Churches. It'll flat curl your hair.
"I swear, I think the seminaries were infiltrated by Marxists a decade or so ago, and now we are seeing the poisonous fruit of the effort."
I think it's more like 3 or 4 decades ago
It's been going on for longer than that in Britain. I believe many clergy in the Church of England dabbled in Communisim in the 20's and 30's, so that when society was so severely challenged during the second World War, they no longer had any spiritual sustenance to offer people. I believe that's why there are so many in England who no longer believe or bother to attend Church even if they DO believe. They saw their leaders completely lose faith, and they followed suit.
I believe the infiltration of marxists in the church began in the 40's.