Because they really do believe (thanks to relentless Democrat propaganda and Republicans' own stupidity) that:
1) Outside of major cities, the US is populated with white, racist rednecks who want to kill them.
2) Republicans want them all deported, regardless of their legal status.
Re: “Republicans’ own stupidity”
Please bring me up to date on that stupidity.
With avid Republican assistance:
Asian Indians acquire or renew more USA work visas each year than any other ethnic group in the world.
In 2014, India was in a virtual three way tie for first place with China and Mexico for legal immigration to the USA - about 150,000 per year.
Re: “Outside of major cities, the US is populated with white, racist rednecks who want to kill them.”
Like the racist redneck homicidal Asian Indian Republican Governor of Louisiana?
Like the racist redneck homicidal Asian Indian Republican Governor of South Carolina?