Very true. There comes a point when those who refuse to see, God makes it so they cannot see. I learned a long time ago to "shake the dust off my feet." People can turn their backs on God for just so long before he "gives them over to a reprobate mind." Their fight is with God, not me.
John 12:40
He hath blinded their eyes, and hardened their heart; that they should not see with their eyes, nor understand with their heart, and be converted, and I should heal them.
2 Thessalonians 2 10-12
10and in every sort of evil that deceives those who are perishing. They perish because they refused to love the truth and so be saved. 11For this reason God sends them a powerful delusion so that they will believe the lie 12and so that all will be condemned who have not believed the truth but have delighted in wickedness
Exodus 9:12
But the LORD hardened Pharaoh's heart and he would not listen to Moses and Aaron, just as the LORD had said to Moses.
Isaiah 6:10 Make the heart of this people calloused; make their ears dull and close their eyes. Otherwise they might see with their eyes, hear with their ears, understand with their hearts, and turn and be healed."
Mark 4:12 so that, "'they may be ever seeing but never perceiving, and ever hearing but never understanding; otherwise they might turn and be forgiven!'"
Romans 1:28 And just as they did not see fit to acknowledge God any longer, God gave them over to a depraved mind, to do those things which are not proper.