I'm not sure if they changed writers mid-development or something. In The Old Blood you'd have some dude come after you in revenge in a mech suit after you killed his sweet little cyber-killer dog previously in the story, as he loudly laments what a sweet little doggy she used to be, those days of joy when they hunted bare-legged Jews in the open prairie, and so on. I thought it was pretty fucking hilarious how someone could love his violent bloodthirsty pets so much, and it wasn't outright stupid either. The guy being a cyber-nazi-hunter-killer-dog keeper would obviously care a lot about his pups and be greatly saddened if one of them were to be brutally murdered by an American pig. We can all relate to that. That's the kind of black humor which would suit WW2 pretty well which doesn't outright ruin the atmosphere or make it hard to take events seriously.
Then we have the first few minutes after you finally get to roll around in your wheelchair and shoot Nazis which apparently still can't aim ten foot in front of them, when you encounter Set briefing you about the situation on the submarine while he activated his microwave traps to keep the incoming Nazis out. While Set tells you shit's going down hard and that everyone might be in danger, in the backgrounds we have Nazis walking into the trap like Lemmings over and over. The emotions flowing through BJ and Set during their conversation are confusion, tension, worry, and anger, while in the background the dumdum Nazis are getting themselves killed because they just keep walking into the trap. For some reason MachineGames thought slipping a comedy skit in the background during a serious scene was a good idea. But it just falls flat because of one keyword: atmosphere.
In the foreground we have two characters who are seriously worried, in the background we have dumbfucks. Since you can tell by the tone of the conversation between Set and BJ that it isn't trying to be funny (unless weiner being said in Hebrew is enough to make you laugh) but desperate more than anything, we can tell that the situation is serious and that the world around them is fairly harsh. But at the same time we have Nazis walking repeatedly into a trap in the background because just like in-game, they can't see ten foot in front of them. If the background is meant to be played for laughs, than it is rather ill-fitting with the foreground. If it's supposed to be taken seriously, then the only conclusion you take is that these Nazis must be morons. Which only raises further questions, such as 'How did these morons even conquer the whole world?' or 'How are these morons even a threat?' or 'Are we supposed to take these jokers seriously?'. Clearly the answer to the last question is supposed to be a yes given that one of those moron Nazis incapacitates you and decapitates one of your friends later on to show that these bumbling dumbfucks are also a credible threat at the same time.
If the conversation between BJ and Set was more light-hearted, then so would the atmosphere be, and you could maybe laugh at the idiotic display of the Nazis since you're not supposed to entirely take them seriously either. But that's not how it is, so you're more likely to wonder how inept the world around you is which then whiplashes the moment the story sets the Nazis up to be a serious threat (unless Nazis dying regardless of the situation is enough to make you laugh) which causes the emotional delivery of those moments to fumble as you're left with unanswered questions. Keyword: atmosphere, it's what makes dancing during a funeral an act of comedy or an act of being an insensitive jerk.