Well… it’s worth noting that (IIRC) a record number of people voted in the 2020 election, overall and for each major-party candidate. Are those who chose to vote for Trump not to be counted among “Trump supporters”? It was approximately (but decidedly not quite) half of voters.
… and with unwanted or simply too many refugees comes conflict, both at home and abroad. Those who are slow to join the Great Climate Migration toward less- or differently-affected areas will struggle more over time, and there will be increasing wealth inequality as a result. It’s a difficult picture of a future to which unfortunately many people seem oblivious.