Back in the late 70s-80s, I personally knew a family of Refusenik Soviet Jews who had been able to sneak out of the Soviet Union (Jews weren’t legally allowed to leave back in those days, and were forcible prevented from doing so). I think that they were in Europe for some medical conference, and never went back to Russia. They moved to my city. The husband was an MD/researcher and the wife was some sort of scientist who worked in a lab. Anyway, Nicholas was able to find a job at the local VA hospital, and his wife in some research lab. They went to English classes. Eventually they had a couple of (American-born) kids, bought a house, and are living the normal life. There were no cultural or political issues. First, they were thrilled to have escaped, and second, the Jewish community embraced them.