I think Cap knows how to compartmentalize. I’m not gonna speak to what the film addresses, but in terms of my character, I think he is slowly – he’s becoming disillusioned as he gets older. Every single movie, he learns a little bit more than the world isn’t the way he kind of wants it to be, and I think that’s why there’s a connection between him and Black Widow. She’s seen a lot more than he has, and is kind of a little more calloused, and I think in a lot of ways, he looks up to that and learns from that. 
Chris Evans, on the evolution of Steve Rogers leading into Infinity War