Also, it's a bit ridiculous to judge Hales character, both off of what we've seen here, and what we saw in R1.
Remember, in R1, it was all told through a 3rd person narrative, with little to no input from Hale, so we really don't KNOW his character, we just know what Parker knows of him, which admittedly isn't much.
We also don't know what happened before this scene. Perhaps Hale is mad at himself because he couldn't kill something and let a certain chimera get away, or some team members died. We really don't know. We do know, however, that Hale has a connection with the Chimera, and when he was reminded of that, it pissed him off, not at this guy, but at himself, which is why he says "I welcome the day" or some crap like that. He pretty much WANTS to die when he's finally turned to a Chimera, but he's mad because he knows his job isn't done yet.
That's my take, at least, lol.