Universal Health Insurance is a double edged sword. Namely due to multiple demographics and the arguments that arise from them. Diseases such as Tay Sachs and Sickle Cell which are restricted to specific demographics, people would complain why should they support paying for conditions they never could contract. Leads down a dark path of infighting and violence. If there is a positive, it would be cutting costs for over the counter meds/Lab Costs for diagnostics/Physical exams/Surgeries for things everyone could get (Tonsilitis/Appendicitus) and reduction of medical itemization in hospitals. We do need a medical system overhaul which is understandable. But complete medical system control by the government is way too much of a risk as the government is run by humans and could result in their own biases coming to the front.
It takes 5-7 or 7-9 years to become a naturalized citizen of the USA and that is if you don't experience any complications during the process such as denial of initial paperwork. 1) Half a year on average for your initial paperwork to clear but it could take over a year in the worst case. 2) Must reside in the USA for 3 years if married to a citizen or 5 if single. 3) After your residency period, it takes 18-24 months to undergo naturalzation. It is unfair for those who came here legit to see that the system they put their faith in being destroyed by scoffaws.
Human beings can also carry diseases too. Unfettered immigration is allowing unchecked migration of illnesses which could potentially infect the population in the country.