This is something very simple, and at the same time, very evident.
Everyone can understand the principle at play here, that this must be the handiwork of a mage.
Unsure of the mysterious magic employed, somehow within the distant forest, a hole had been created in the man's head.
Therefore, under such circumstances, there's no room for further discussion.
Caught in a mix of frustration and anger, the leader eventually chose to accept the reality before his eyes.
"You should have all seen the ultimate outcome by now. While I lead you, the spoils may be scarce."
"But do you really want to risk your lives for those things that drive you mad and obsessed?"
In response, the men, who were on their knees, clenched their fists and lifted them in the air.
"Boss, we're sorry about this. It wasn't our intention. We were just forced into this decision by this guy here."
Another man followed suit, echoing the first man's words as an addendum.
Then another, and another followed.