Racist ideas justify discrimination against Black institutions, not just individuals.

Evidence

Racist ideas not only justified discrimination against Black people, but justified discrimination against Black establishments and against ideas promoted by Black activists, such as Black Studies. — Ibram X. Kendi, Stamped from the Beginning, 1024

Categorization

• DEFINE: Extends the book’s core causal model: racist ideas function as justifications, and this passage extends the target of those justifications from people to establishments and ideas.
• XREF: Cemented in the reader’s stated goal — this is a precise articulation of how the ignorance→hate→discrimination reversal is supposed to work, with ideas as products rather than causes.