Immigration Question

Okay, for the sake of argument, let's say the reason right-wing Republicans are upset about illegal immigrants has nothing to do with right-wing Republicans being worried that the country is being taken over by brown people who speak Spanish.

What exactly ARE right-wing Republicans upset about?

That people are coming here and performing cheap unskilled labor?

Are conservatives really threatened by that?

Or are they upset that illegal immigrants pay taxes but don't get as many services as citizens?

I don't get it.