Like an erupting volcano, the more he spoke, the greater his anger billowed out. While conversing with the collective consciousness controlling Stencil, even though he didn't display it on his face, he was internally hurt, angry at himself and at his enemies that dared this.
After all, he was able to infer a lot of details, especially since he had a relatively better understanding of collective consciousnesses thanks to the wristwatch that Hazen had given him.
Through it, he found out that Stencil had been at constant war against the collective consciousnesses in her body, one that spanned decades. She had used the Coordinates he gave her as collateral to set up a base of operations and gradually influence her body.