Did evolutionary scientists not understand these things already?
It is basically the denial of human exceptionalism. That is, it is hatred of man, in practically every way imaginable.
One currently common view, eliminative materialism, says there is nothing to the mind except what goes on in the brain.
If what separates us from other animals were material in nature, material alone, then perhaps we could look to a material process for an explanation.
How much do you have to know to make a design inference?