Mexicans

So this may seem dumb to some but me & my fiancé got into somewhat of a heated argument bc he said some racist ass shit about Mexicans ... I'm not Mexican, I'm black & Puerto Rican but how dare he say such mean things about a group of people of which he all categorized. Mexicans in my opinion have & will ALWAYS contribute to the states in whatever way you could think of. I give the hard working ones prompts bc they work their ass off doing most jobs that many Americans dare wouldn't. To sum it all up, I think it's truly mean to be racist towards a specific group of ppl for other than being simply who they are ....