yeah interesting. might have something to do with how relatively young this country is. A lot of those counties americans land in might already have been shaped.
Personally, i get that 'fear' or whatever - maybe there is a better word. People by nature don't like to see shit they know and love change. But a lot of the change I'd like to see from immigration would be more organic, as in dying upstate towns with crumbling abandoned factories and weed covered former rail tracks, sprout up an immigrant community, which then opens up their own shops to buy and sell shit they like, which creates jobs, creates ethnic restaurants that others then like to try when it is real deal, all of which injects $$$ and life into local economies.