Disagree. If Trump wants to build a Hispanic coalition, he only needs to argue why legal immigration is better for Hispanics than illegal immigration. Legal voters will see the logic if he presents his case. The only losers with legal immigration only is the cheap labor express - Chamber of Commerce and others who celebrate the low wages and lack of protection for illegal workers. If Trump articulates this, he can win Hispanics over from Hillary.
More important, Trump can appeal to voters as Americans, rather than dividing them into narrow demographic profiles and pitting one group against another - the only way someone as unpleasant as Hillary could win. Trump has reach out and articulate why his positions are correct, but it is doable.
Hispacnic voters got to eat and fee their familes. This notion that voters are monolithic blocs that can only be appeased by pair-emtive surrender to their every whim is why the GOPe has failed so miserably the last 30 years.
Legal Hispanics tend to resent illegal ones. The illegals and legals coming the last two decades are of a different type than those previously.
I hear the disdain expressed often in Arizona.