Trump is not planning mass roundups and deportations of non-criminal illegal aliens (yes, I know that's an oxymoron). But if these radio stations want to gin up hysteria, and if the illegals are stupid enough to buy into it and start self-deporting, then I see no downside. Makes Trump's job easier.
Take away the jobs and welfare, and they will be gone very fast. There will be traffic jams going south across the border.