The implication is pretty clearly “the immigrants are coming to take your jobs, black people”. Especially when said to a room full of black people. Especially given that that has been standard republican messaging for well over 50 years for all ethnic groups.

That is still racist. It is still manipulative. It is still scummy and bad. It just is pretty clearly not logically equivalent to “immigrants are coming to take the jobs segregated for black people”.

And obviously state of residence is not equivalent to race. It is an example. It is the same logical form of argument. They’ve done the same thing (about race, specifically) to rural white folks since literally the trans-continental railroad, but then about Chinese immigrants mostly. In modern times, the meaning has never been “only x race can have y job”. It has always been about the threat of the outsider (immigrant) “stealing” jobs from non-immigrants as a way of causing an us-vs-them dynamic. That is still a racist dynamic. But it is not the same as saying only x race can have y job.