Immigrants being on the right is also implicit. Almost nobody is gonna migrate to some place new because things like recent changes are going well for them in their country of origin. They instead leave and migrate to some place that is relatively more stable & predictable. Host countries don't like it when people migrate over and start agitating for change. As a result conservatism is built into the process.

–Consider the Cuban Communist. The Cubans that are happy with Communism have no major incentive to leave and resettle in Miami. The Cuban Capitalists OTOH flee to Miami where they espouse the evils of Communism while advocating for our government to continue the trade embargo, ensuring they can spread their pain to their fellow Cubans back in Cuba. It's the same exact story with Falun Gong