(cahn, please delete the anonymous version. Why I keep getting logged out, I do not know, but I suspect some conspiracy involving Prussian cyber agents from the beyond.)
re:replacing real Fredersdorff with fictional Goltz, no, I have no idea what was up with that, either. The first time I watched, I thought something might happen to Goltz, hence the switch, but no, it doesn't, so that can't have been the reason, and it's clear the scriptwriters did their research (there's a great amount of real quotes built into the script, including the one about Voltaire), so it wasn't out of ignorance that there was a real person Fritz could have had this scene with.
However, I would say that your high speed, no sound method of watching gives you a wrong impression about how fictional Goltz regards Fritz. Because the intonation and the way of phrasing makes it pretty clear to me Goltz does care, and when he says "it's not good for you" when trying to talk Fritz out of the roleplay, he doesn't sound cautious or bothered, but seriously concerned (for Fritz, not himself). It's not remotely a relationship of equals, of course, but the actor who plays Goltz does a lot with the expressions and with the way he's watching Fritz in public, too, so the impression I had was that knows he shouldn't care (because when all is said and done Fritz is a mess and his boss, a dangerous combination) but he does.
Also, if you watch a little further you'll get to the scene where Bach and Fritz bare their souls to each other (Bach with his "I'm going blind and also, I shouldn't have burdened my sons with being in the same profession as me" and Fritz with his myriad of issues) and old JB actually does try to comfort Fritz.
Re: Epic rap battles of history
re:replacing real Fredersdorff with fictional Goltz, no, I have no idea what was up with that, either. The first time I watched, I thought something might happen to Goltz, hence the switch, but no, it doesn't, so that can't have been the reason, and it's clear the scriptwriters did their research (there's a great amount of real quotes built into the script, including the one about Voltaire), so it wasn't out of ignorance that there was a real person Fritz could have had this scene with.
However, I would say that your high speed, no sound method of watching gives you a wrong impression about how fictional Goltz regards Fritz. Because the intonation and the way of phrasing makes it pretty clear to me Goltz does care, and when he says "it's not good for you" when trying to talk Fritz out of the roleplay, he doesn't sound cautious or bothered, but seriously concerned (for Fritz, not himself). It's not remotely a relationship of equals, of course, but the actor who plays Goltz does a lot with the expressions and with the way he's watching Fritz in public, too, so the impression I had was that knows he shouldn't care (because when all is said and done Fritz is a mess and his boss, a dangerous combination) but he does.
Also, if you watch a little further you'll get to the scene where Bach and Fritz bare their souls to each other (Bach with his "I'm going blind and also, I shouldn't have burdened my sons with being in the same profession as me" and Fritz with his myriad of issues) and old JB actually does try to comfort Fritz.