From the paper "This is partly because the previous work wasn’t published in the international scientific literature, but Villa thinks there was another reason the Bruniquel finds were overlooked in the late 90s and early 2000s: mainstream scientific thinking at the time simply rejected the idea of Neanderthals as intelligent and sophisticated.
“[It] ran against the prevailing and damning views of Neanderthal inferiority compared to modern humans,” Villa says.
It still does...
Aside to Donald, you're right about the 'establishment'.
