In regards to the territorial demands, there is a difference. Essentially, the Germans aren't demanding simply a return to Weimar borders, but a return to Weimar borders for both Germany and Poland in an effort to undo the "Molotov-Ribbentrop Abomination." It has nothing to do with the rest of Europe and it's goal is to attack the USSR. Granted, most of the West will be pissed at Frey but they are too concerned with the Soviet threat to throw him under the bus. I'm setting up for a post-Cold War dynamic
But it makes no sense because the people who justified those borders aren't there anymore. What they are arguing for is either the Germans taking a ton of Poles in and the Poles a ton of Russians, or another wave of ethnic cleansing. It completely flies in the face of the modern definition of states on ethnic lines. It's just them wanking themselves in front of pictures of the old German empire and hoping it was reality.
I tried finding an example to compare it to but I can't find something ridiculous enough to be on the same level, because in most cases of weird historical claims, there is at least some people left to justify it. For example, modern day Austria claiming that Italy should give back south Tyrol could at least find a few German speakers there. But the Germans in the places the Freyists are trying to claim are just not there anymore. And it's well established that a nation state's claim to the land is based on the people, not arbitrary lines on a map, at least in the modern day.
You can't have it without either a massive change in Germany to handle their new influx of Polish population (who won't accept not being citizens under traditional German citizenship methods) or a reverse of what Stalin did with ethnic cleansing.
And smaller claims aren't more logical, because Stalin was very thorough. The ethnic map may have been muddled before WW2, but it sure wasn't after. There is no part of the eastern border you can legitimately claim as German.
But if your goal is to show Nazis can't really be reformed, you should keep doing what you're doing!