Earlier quoted context omitted.
Well, it's less that the law led to difficulties and more that the law ignited pre-existing bigotry, similar to some poor white Americans being opposed to welfare out of biases against poor black Americans thanks to a successful (implicitly racial) hysteria about "welfare queens". The Prussians were "fine"[0] with travelers as long as they were second-class citizens who didn't have access to welfare. As soon as citiz…
The crime statistics are real, though. Failing to recognize the problem created the likes of Alternative für Deutschland, Marine Le Pen, Brexit. Let me reiterate it, because it is crucial: liberal policy of pretending that the problem doesn't exist is what created all those garbage political organization. Which, interestingly, are often co-financed by Russia.
As for the claim that "ignoring the problems" is a "liberal policy" - that's a made up strawman.