It was definitely a face of hatred. See >>114529726
He did know it was Saazbaum who shot her. That's why Slaine started pouring bullets in him, even though he was missing due to emotional conflict.
When he saw Inaho crawling towards Asseylum, he had no qualms killing him. It was pure hatred (which sadly stems from a misunderstanding). Remember he thinks Inaho is exploiting the princess, and of course Inaho shot him down in Episode 7 after Slaine attacked him.