The Minutemen had dozens in their "national mobilization", while pro-immigrant rallies have had millions. None the less, the Minutemen continue in the KKK tradition of so-called "nativist" groups(that HATE Native-Americans!) that protested Irish and Italian immigration a century ago.
Now the KKK and Nazi purveyors of race hate target Latin-American migrants for their hatred, their legal oppression, and even death threats and murder. Keep in kind, there have been several unsolved murders on the border since the Minute-Klan began their armed patrols, all shot with rifle rounds.
