Who is going to pull the trigger? Point to the opposition leader willing and able to try and dismantle a party with this many active supporters.

Read the article. It’s already happening.

Which are used to target unpopular fringe groups not regional majorities.

You don’t seem to know a lot about the German constitution. The opposite is true. Unppular fringe groups are not banned because they are not actually a danger to democracy, as long as government positions are not in reach for them. That’s exactly how the german federal constitutional court has argued in the past. Successful bans ever only targeted actually successful parties.

The core mechanism of democracy is to abolish political organizations wholesale?

The core mechanism of democracy is to protect itself, and first and foremost that means protecting itself from facism. A political organisation that’s threatening democracy should obviously not be allowed, so it will be banned.