Clinton you beat me to it. In the above quote ( written by someone who once worked at CASA ) we see convoluted language open to misinterpretation.
The statement “ and they weren’t kiwis” is redundant because the writer has already used “foreign nationals”. Full stops to form short sentences and rearranging the order would make sense of it.
Apologies to the literati for stating the obvious.
On the subject of full stops, in certain circles (e.g. advertising) these are no longer used. Removing them makes more space for errant apostrophes.