Do not blame Narcissistic Personality Disorder for the menace that is Donald Trump. Many people with personality disorders have good values and feel compassion. Most people with mental illness lack the societal status and power required to wreak the kind of havoc Trump has devoted his entire life to creating.
We can speculate all we want — Trump’s never been diagnosed as far as we know — but Trump’s story is not one about mental illness. It’s one about misplaced values, hatred, and the enormous status and wealth that has allowed those character faults to find purchase and ruin people’s lives on an international scale.