Migration

So, the Left has decided that the PC term for illegally entering the U.S. from Mexico is migration.Lol.
Like the people are birds or butterflies. Wouldn't it be nice if the problem were truly seasonal like birds and butterflies, instead of constant and never-ending?

Has anyone ever asked the leaders and followers of the pro-immigration Left, why the people from Mexico should get special preference for the "jobs Americans won't do?" I mean, there are plenty of poor Asians who wouldn't mind picking vegetables instead of working in the rice patties. Why shouldn't they get the same opportunity to " do the jobs that Americans won't do" ? Why shouldn't we limit the number of Mexicans and central Americans sneaking in and allow Asians (an others) to enter legally to do the work?

What is the Left's response to that?
Why should migration only occur with those south of the border? What about those who want to migrate from across the ocean? There's only room for so many and only enough "jobs that Americans won't do" for so many, so why should non-hispanics' desire to migrate take a back seat?
I'd like to hear the answer.
Alguien?