They are pushing taxpayers and consumers, good people who just happen to be undocumented away because of racism and prejudice.
People are so fed up with the situation overall - the American public does not wish to push immigrants away, they want them vetted and regularized. If Trump et al are smart, they should start a legalization program with a path for citizenship for Dreamers and those who have lived here for 15-20 yrs. Recent arrivals can get permits.