You do realize a society can do more than one thing at a time, right?
Like, demanding police chiefs to arrest Nazis under the same circumstances that they arrest left-wing protesters is not going to magically diminish the work of left-wing lawyers and politicians to redefine the rules so that protesters, in general, are not being arrested. Even application is kind of the point of laws, and not simply allowing but actually advocating that an unequal application of the law be perpetuated (because it wouldn’t be fair if the Nazis got the same treatment as left-wing protesters) is, itself, incredibly damaging to the legitimacy of the government as a whole.