Hi Max,
In my opinion, this solution is not a fair one since inspecting the exam before the re-exam gives you an advantage for the latter one. You can see which mistakes you made and how specific tasks were scored, so you can prepare better for the re-exam.
If you had announced this date at the beginning of the semester and had said that it is the only possibility for inspection before the re-exam (as it is done in other courses), that would have been fair, because then one could have planned the semester break accordingly, but announcing the date only two days in advance is too last-minute. You must also take into consideration that there are many students not coming from Saarland who want to see their families during the semester break and they can't book train rides or even flights only two days in advance.
Best,
Sophie