those can be removed easily once in power and the "conservatives" have blocked probes into police violence and systemic racism as well as fascist terrorist groups inside the police for decades. So if the constitutional court rules against such a government it is very well possible that they just get ignored or worse attacked by the government.

Democracy doesnt survive through laws and institutions. It survives through the people involved in the political and governmental processes to uphold. And the German "conservative" parties are happy to hurt democracy if it gets them back into power and to do the equivalent of "owning the libs". They have considerably radicalized and are trying to do things like Trump did.