I recognize some of those characters in that sentence.
NPD = National Democratic Party of Germany, far right nutters who claim to be totes not racist at all.
BfV = Federal Office for the Protection of the Constitution, whose modus operandi seems to be to pay a salary to select neo-nazis in exchange for information. The NPD is apparently chock full of these, which makes it difficult to prosecute them since it's unclear how much influence the informants had on the direction of the party. Also like to
accidentally shred files destroy evidence when it looks like one of their precious informants did a boo boo, suggesting that the BfV may have at the very least known about the boo boo.
The NPD can't be shut down because the BfV is LARPing The Man Who Was Thursday, Arvie.
The BKA (our FBI) and the BfV might get more funding soon to deal with the growing number of right wing and neo-nazi groups. I'm sure that will go well.
Ironic side note: the right wing nutter who recently stabbed a mayoral candidate in the neck for her support of refugees is rumored to have worked as an informant for some time.
spoiler (click to show/hide)
She's in stable condition and has won the election. Eat shit, assholes.