Arguments to work off:

>Imported for cheap labor by corporations, modern day slavery
>Immigrant cruelty (animal rights, halal, sacrifices, acid attacks)
>Environment degradation and the destruction of national parks
>Increased chance they will join drug smuggling gangs/groups
>Welfare addicts, don't work; social budget depleted, certain groups will be more sensitive to this news
>Population surge, with resulting food/water shortage crisis, resources taxed
>Prep for impending disruptive wave of refugees
>Repeal and replace corrupt and outdated immigration system
>More Americans out of jobs than ever

Remember the pillars of persuasion that Dilbertman instilled in us all.

General population likely most sensitive to Pathos arguments.

*Word choice matters and can trigger the correct emotional response.