You have to understand the Saturday Morning Cartoon universe these people live in to understand why they act this way. It's not quite as simple as "they're racist". They're just stupid.

They believe that everything bad happens because of right wing policy. They, as white people, have no money. This is capitalism's fault, and it affects everyone. You are Latino, and thus a victim of systemic racism. Therefore, you are both oppressed by capitalism and systemic racism, and as such it is literally impossible for you to succeed. If they can't succeed despite their very real White Privilege™️, how could you possibly do so?

If you do succeed, it demonstrates that their formula is flawed, so they simply dismiss it as a lie or they experience a brief moment of cognitive dissonance before their smooth brains automatically purge any pesky information that makes them feel bad.