Express a pro-Trump and anti-Mexican opinion and criticize Canadians for not doing enough to clean up their country.
Trump isn't slouching "toward authoritarianism" he is properly exercising his presidential duties. I am surprised that you are claiming that Mexico has no "rapists" or "criminals." That seems like a stretch. Why would the U.S. want Mexico's criminals, rapists, drug smugglers, and those engaging in human trafficking? Why does Mexico object to a wall. If Trump decided to build a wall on the Canadian border, Canadians would care less. Mexicans illegally enter the U.S., commit crimes, and when arrested complain about persecution? They want to fight deportation of illegal aliens who are  guilty of committing crimes? Why would Canadians back that? Instead of complaining about the mistreatment of Mexicans, work on cleaning your country up. It's a mess!