>  LL> Neither did most Italians, and Irish, and Poles, and Africans ...

> Are they still sneaking in?

They never snuck in at this magnitude because they share no common border.
Many of them came in the day when everyone was processed through places
like Ellis Island where the government could take more time to determine
who they were getting (and give them time to get over any diseases they
might be carrying) before releasing them into the public.

---
 * SLMR 2.1a * Isn't this where....