[pluma]

I'm sure the voters of 1998 would love to have seen the Greens be sued for their support of militarism, or the SPD for their neoliberal labour reforms. But alas there were merely a few protests.

If the Wahlprogramm were legally binding, there would have been plenty of opportunities to sue.

For the record: the reason the Verfassungsschutz might tear into a party is usually because the party harbors anti-constitutional ideas or associates itself with criminal organisations, e.g. the NPD with its neo-nazis or the Left with antifa.