intellectualism or anti-intellectualism and Buddhism
I don't think Buddhism is inherently anti intellectual. Theravada's Abhidharma, Late Indian / Early Tibetan Mahayana preserved and developed by Gelugpa - are highly intellectual, to name a few.

It's an old adage in Buddhism that Dharma is medicine for the mind, and particular form the teaching takes depends on student's disposition.

There are certainly schools that grew out of concern that some students obsess over concepts and don't see the forest behind the tree. These schools, like many lineages within Tibetan Kham's Kagyu and Nyingma emphasize personal practice and insist on simple no-nonsense pithy instructions passed in private from generation to generation.

Some schools like Ch'an were born as radical response to then increasingly obsessive and speculative intellectualism, true, but Ch'an is far from being the largest or the most influential school. Perhaps the most famous in the West, exactly for its irrational presentations.

The truths that Buddhism teaches are complex and subtle, but in my opinion totally explainable. It's only a matter of time I think until western culture develops enough insight into things Buddhism taps into, and creates an authentically western intellectual representation of them.

We see it already in various forms of literature on topics as diverse as self-help, emotional intelligence, philosophy of mind, bundle theory, hierarchy theory, and others.