Why the "Beat" appropriation of African-American "bee-bop" and "hipster" culture

Why was the "Beat" appropriation of African-American "bee-bop" and "hipster" culture of importance to the initial spread and eventual normalization of marijuana (and then narcotics) into the Caucasian, middle-class, college-educated demographic? Per Jonnes, looking more broadly (outside of drugs), how did mainstreamed "Beatnik" values embraced by youth culture interact with other social trends to create a "perfect storm" enabling the anti-authority counterculture movement of the 1960s?