It does not claim that this national right is unique to only Slovenes. It refers not to a people but a nation albeit Slovene. I think distinctions matter, one is inclusive (theoretically) the other is exclusive and very specifically in who among its people’s has national rights and self determination. I think if this part had been left out, critics would not had much to stand on.
If that part 1C had been left out, it would have been better, but not that much.
1 — Basic principles
A. The land of Germany is the historical homeland of the Aryan people, in which the State of Germany was established.
B. The State of Germany is the national home of the Aryan people, in which it fulfills its natural, cultural, religious and historical right to self-determination.
How would including the above into the German Constitution not constitute a mortal threat to Jews living in Germany? It may not actualize itself right away, but you'd see Jews heading for ports nonetheless, quite understandably so. At the very least, these provisions would tell them in no uncertain terms they are not welcome, not "at home" in Germany.
As much as I understand the Jews' determination never again to be a harassed (or worse) minority in their homeland, how they go about achieving this aim matters, and a great deal.
But, here's the thing I do not understand. The Basic Law was passed, 1C included. The determination to exclude Muslims and Druze from Israel's national self-determination, and the Druze, the Jewish majority's most loyal allies, are acrimonious over it. Do you really think that would have been much different if the part 1C had been left out? The intention that led to that law would still be there, just slightly less visible, and that intent is to confine the minorities to ever smaller portions of land, while grabbing the entirety of the Westbank, including the Bantustans there. Which, of course, is a recipe for continuous, endless strife, and ultimate disaster. So, why cling to "if only they had left out 1C"?
What I am trying to say is, I watch you arguing that law without ever seriously taking the perspective of those excluded from being at home in Israel, excluded from Israel's national self-determination. That's puzzling, and that's why I repeatedly bring up Germany and Aryans, which sharpens the point somewhat unfairly, I guess.