Infuriating Hispanic activists and ethnic hustlers. Probably no objective measure so far of how Hispanics as a whole view Trump.
But the GOPe's obsession with pandering to Hispanics will hurt the eventual Republican candidate far more than anything Trump might do. They're just not yet smart enough to realize that all their pandering can cost them more votes than it can possibly win.
It is the racist liberals who assume that all Hispanics are illegals.