Piper was influenced by MacDonald and Chesterton and loved them dearly. According to Piper they mocked and verbally abused people. According to Piper, “John Piper feels healthier after reading them”. This is why Piper isn’t enlightened. He acts the same way his beloved mentors did.
God does the mocking on Judgment Day. For Vengeance belongs to Him
I also will laugh at your calamity;
I will mock when terror strikes you,
when terror strikes you like a storm
and your calamity comes like a whirlwind,
when distress and anguish come upon you.
Then they will call upon me, but I will not answer;
they will seek me diligently but will not find me
In this video even Tim Keller (who has read MacDonald) claims it’s unlikely MacDonald was enlightened. They even talk about how C.S. Lewis brutally bullied people in debates. As you know George MacDonald influenced him. Piper tries to justify this by calling Americans “touchy feely” people. John Piper never denies George MacDonald’s authenticity. You can see how much Piper is influenced by MacDonald in his own behavior on youtube videos if MacDonald acted the way Piper says. Piper tries to justify his behavior by appealing to the behavior of Lewis and MacDonald.