The H1B system sucks. Open the borders and just let everyone come here who wants to. We have plenty of room and immigration has resulted in so many great parts of the US due to the intermixing of cultures. If you're worried about crime well all the ICE agents will need new jobs.
Societies are complex, and humans are still very tribal. Any large influx of new population changes everything significantly, for good and for worse. And there will be resistance to change. Intermixing of cultures takes multiple generations, if at all and even then you will see silos.
We just need to look at how things are even now, even with the supposedly local population - caucasians, hispanics, african-americans and native americans. And they've all been together for centuries.
(1) Canada has never had an open border policy and (2) our skilled labor market is extremely robust. We have significant issues with housing in metro areas that are related more to extremely NIMBY zoning laws than anything else.
