What could be more Anglo and Trump-like America Firsters than Western ranchers like the Bundy clan? Turns out that, whatever their present is like, ranching in the West owes heavily to Mexican practice and Spanish language. The word ranch is Spanish in origin. (Here is a good source, The Encyclopedia of the Great Plains; this entry is on Hispanic ranching heritage).
And where did the Mexican practices come from? Cattle were introduced into Mexico in about 1520, from the Spanish colonies in the Caribbean, where ranching was carried out partly by African slaves. One small example of an African influence is “dogie," as in "...git along little dogie.." which is a word thought to be from the Bambara language (West Africa). The cattle came from the Spanish Atlantic islands, and originally from Spain. The slaves would have been from North and West Africa. Once ranching began in Mexico, Indian laborers probably replaced most of the African slaves.
Recall that much of Spain was part of the Islamic world from the time of the Visigoths to the year of Columbus. Andalusia is the part of Spain where ranching took root—Muslim al-Andalus. The “Arab” invasion and conquest of Spain took place in the 700s, but the majority of soldiers were North African peoples like the Berbers and Moroccans, and the connection with Africa remain strong during all those centuries. The famed Texas longhorns descended from Spanish cattle brought to Mexico, and the Spanish cattle descended largely from North African stock. The sturdy cowboy pony descends from Spanish stock and ultimately descends from horses brought to Spain from North Africa.
Folks like the Bundy bunch live in a landscape sprinkled with Spanishness, with many features given names by centuries of Spanish explorations from Mexico. These include canyon, mesa, arroyo, sierra (as in Sierra Nevada, roughly snowy mountains), playa and other terms (butte is from the French). The states of Nevada, Colorado and California have Spanish names and other states in the region derive their names from Indian words filtered through Spanish (Arizona for example).
It’s not clear if the Bundy-type folks ride horses, or tend their range in an ORV made in Japan. But if they ride horses, their equipment is partly Spanish. The ropes called lariat or riata are Mexican Spanish, as is lasso. Chaps were invented by Spanish cowboys to protect riders’ legs as they rode through rough brush. Some Western saddle parts have Spanish names (here's a diagram of the Western saddle—it has 23 parts!) The word corral is Spanish. Some aspects of Western rider equipage of spurs, bits and other items are Mexican versions. Quirt is Mexican Spanish. Oddly one term that’s come to be seen a part of cowboy clothing is the bandanna, and that word originates in India.
There are a number of other words that have a sort of Western flavor and have Spanish origins. Armadillo and coyote both come from Spanish, coyote from Nahuatl (the language spoken by the Mexica people, that is the Aztecs). Plaza, patio and mesquite are Spanish. Much of the vocabulary and technique of rodeo is Mexican Spanish (rodeo is Spanish, of course). These include mustang, bronco, and stampede. Most people will know that a bad hombre, to use a term our new President seems to like, is Spanish, but few will know that buckaroo comes from the Mexican word vaquero. The techniques of bronco busting, roping and branding cattle derive from Mexican techniques. The first Texas cowboys on a cattle drive were Mexican, driving Texas longhorns to market in New Orleans in the 1760s and 1770s
The famous cowboy hat has its origins in the sombrero of Mexico. The hat got its current form from Philadelphia hat maker Stetson in 1865. In one of the ironic turns of history the Stetson hat, partly based on Western hats originating in Mexico, has now become iconic in Mexico as well as the American West.
And apropos of folks like the Bundys, the words vigilante and renegade are Spanish. One can hope that some of them, if they keep up the confrontations with federal officers on the public lands, wind up in the calaboose (from calabozo). (This last is a feeble attempt at humor, since it means jail).
My point here is that just about anything American is multicultural. The American West, icon of rugged individualism and more recently the iconic patriotic, free-market, independent rancher, is the same multicultural phenomenon the rest of the country is.
A few other sources.
Lone Hand Western, a site about Western history.
Texas State Historical Society on ranching in Texas
Babbel.com on 143 English words that are really Spanish
Wikipedia entry on rodeo