The two might both be true (Trump got more call-in support, but not more poll support), but I also wonder how they selected the pollees.
There are valid reasons for legal American Hispanic immigrants to not want uncontrolled groups of illegales to be coming into the USA. I had a Hispanic neighbor a few years ago, a lady born in Mexico who was unhappy with the illegale problem. Gave them all a bad name, and competed with them for employment.