Hispanic Americans are overwhelmingly working class, and (unlikely black people) don't see themselves as a single unified minority group, so they don't feel the sting of Republican racism pointed towards them.

Why doesn't working class matter? Because such people generally aren't as involved in following politics and policy type stuff as white collar folks. So they are swayed by other factors like masculinity signalling. This is obviously why Trump added Hulk Hogan, and of course standing up and pumping his fist after getting nicked in the ear by a terrible sniper helped too.