And given that removing the FP nature of Scala pretty much hamstrings its value proposition, I can see why he'd be dismissive of it on those grounds.
https://clojure.org/reference/multimethods
https://clojure.org/reference/protocols
Already at Xerox PARC, Lisps started to support OOP, with FLAVORS for Interlisp-D being one of the first ones.
EDIT: Disregard the last paragraph, lispm is right.