Find me a source that says humanism and atheism are the "dominant religions in America." I dare you.I'd say so. Humanism and atheism are the dominant religions in America. Most are flat indifferent towards the message. In Other places they flat out hate the gospel so perhaps it may be easier to reach them.
The harvest is plenteous but that may not be in America.
But once again, the thread is about how the Holy Spirit works in evangelism. Your favorite writer on personal evangelism actually has a chapter on this. Surely you can write a positive post instead of all of this negativity. What does the Holy Spirit do in evangelism and salvation?