The hell are you even talking about?
I don't think I can compose an answer to this that isn't patronizing, so I'll just say that I don't think what I said was difficult to understand.
Still counts as racist.
rac·ist
noun
1.
a person who believes in racism, the doctrine that a certain human race is superior to any or all others.
adjective
2.
of or like racists or racism: racist policies; racist attitudes.
You really think they would have agreed with the first definition regarding Mexicans? How many Americans think the French are "dirty" because of the stereotypes around their hygiene? If they met a French person, would they recoil, and leave the room? Would they say they don't associate with French people? I doubt it. I believe they're simply ignorant about Mexicans. It's alright. In the end, they're pretty harmless views, easily remedied by more exposure to the outside world.