If you read the German police source linked below by @InnocentBystander you will find that absolute crime figures are, in fact, down. Not "way up" as Trump says.
So whether you include crimes by foreign nationals or not, Trump is still wrong.
As in the previous year, about 30% of all suspects were not German nationals; the absolute number fell from 616,230 in 2016 to 599,357 in 2017. Of this number, 27.9% were asylum applicants, beneficiaries of national or international protection, persons granted asylum status, persons whose deportation has been temporarily suspended, refugees admitted under humanitarian relief programmes or foreigners residing in Germany illegally. This group accounts for 8.5% of all suspects (2016: 8.6%).
Edit : Grammer
I agree. I'm not defending Trump, he's simply wrong on this one, but the Vox article uses semantics to refute a claim that wasn't made.
When Trump (incorrectly) says migrant crime is up (one might also specifiy "Berlin" and "violent" as qualifiers). Vox replies net crime is at an near-record low. Neither are talking about the same thing. Trump is outright incorrect, and Vox (instead of focusing on the actual topic) decides to write one sentence saying "he's wrong" and follow it up with two paragraphs of tangential factoids about how the minister of the interior did his job(?) by releasing stats that don't confirm his beliefs, or the popular theories about why Merkel is losing support within her party.
I guess it says a lot about the state of the world, but I actually expect more from journalists than I do from a president shitposting on twitter.
Just to show that I'm not just taking a partisan stance on this, here's a damn good story that Vox could have published:
"Trump tweets flimsy facts: here's why we should be cautious where we get our news" The bullet points: Trump sometimes gets his facts wrong, and twitter provides a platform that stifles rebuke. As with other world leaders, Trump uses half-truths and lies to serve his own political interests, but never before has the media been so complicit, and gained such notoriety as a result. What's more dangerous, a president that lies, or a system of media where lies can't be addressed?
And boom, just like that you'd have some journalism.
Boooooo. Anyone that cares enough to translate the source document will find:
Might be worth mentioning that the rates of sexual assault are up a significant amount. You'll have to download the actual PKS 2017 and manually translate to get that info though, since they've conveniently left it off the in-browser abbreviated report. The picture gets even worse when sorted for region.