

It’s a shot before the bow. His behaviour in the past had been quite autocratic, trying to pressure parliament etc so this is people telling him that he may be in charge, but he’s not in charge.
And he seems to have understood, judging by his face when he was told so in no uncertain terms by one of the speakers. That shot stung.
The states generally have shit covered on their own and aren’t relying on the BPOL, the BKA certainly won’t get involved, they could divert some personnel from the railway system or Bepo. I very much doubt that, though, why do things when you can say that you’re doing things.
…in fact, if I were a BPOL higher-up I’d interpret “tighten border controls” to mean “stop that pointless driving around in the countryside and station those people at international airports, instead”. You know, places where there’s actual border checkpoints that can be tightened. Let state police deal with stray foreigners dumped roadside.