Not gonna click your link coz I think I know exactly what kind of crap will be in it, but generally speaking, when people complain about being called racist the reason they've been called racist is because they've made sweeping degrading statements about large groups of people as if they are one monolithic structure, and what is being said applies to all of them. ("Mexicans are lazy, stupid, smelly, deal drugs and wear big hats.")
Rarely do you find a racist who does not succumb to the sweeping statements fallacy.
But surprise me... Show that you're not one of them.