Which is ironically the classic leftist argument against free migration until the one world economy is realized. Constant immigration of low skilled labor serves the capitalist class by suppressing wages and stirring up resentment amongst the rabble so they turn on each other instead of their oppressor.

shouldn’t Republicans want immigrants to come here and compete for work

Yes, they do - which is why they do everything in their power to keep that disempowered labor disempowered by hysterically painting them as an "other" that must be repressed through every means available.

It's just how right-wing ideology has always worked.

They do, immigration is a often a talking point for manipulating the hateful.