It appears that the legislators of AZ not only dislike the immigrants from south of the border because of their race, but, because of their lack of wealth.
From Terry Greene Sterling
“Rep. Kavanaugh announced that “illegals” who were Canadians could “stay” in Arizona because they have money and buy real estate.”
The fact that the immigrant community makes up a good deal of the AZ working class labor force has them viewed by the elected officials as the both disposable and not even human, hence, tag as “aliens”.