Markus
Banned
I seriously doubt that Germans had no history of organised crime like Italy, Japan and China.
AFAIK we actually didn´t, at least not on the level of the above mentioned nations. We also did not have was a prohibition, thus organized crime was limited to "small potatoes" like prostitution, theft, robbery.
And IMO a massive influx of impoverished and radical Germans is difficult. If WW1 ends with an early compromise peace and no big economic trouble in europe, there will be no german mass exodus to the USA. But if there is a late peace and big economic trouble in europe, the USA will be affected. They loose markets and loans. Under these circumstances limits on immigration would be very likely.