Probably two good reasons why atheists and seculars react in such a way. The first one is 'they' deep down know there is the God and Creator of all and He has rules they don't like. They also think God is a 'bully' to press rules on humans. So it all goes back to pride and arrogance. They know, but reject Him.
The reason seculars also despise Christians in the US is because they know we will not 'go away' very easily. They want us to retreat to our churches and be relegated to 'ghetto' status.
Good points. I’ve settled on Romans 1 as my anaswer to the perennial “But what about the________ people? Do you really think God would send them to Hell for not knowing?”
Romans 1 says men knew and KNOW but suppress the truth. If a tribal man does not suppress the truth, I’m convinced God will reveal Christ to Him. The Spirit is not limited by geography or language. Some Muslims report being given a vision or dream of Jesus that led them to Him. Once in faith, the miraculous likely recedes because “the righteous shall live by faith”. The point is God can save anyone, ANYWHERE, if they are open to His Son.