Afro-Asiatic substrate

Several years ago there was a brief discussion here about potential evidence indicating a possible Afro-Asiatic Substrate to Northern European Germanic and Celtic languages in Continental Europe and the British Isles (possibly explaining the non-Indo-European lexicon within Germanic?-which is 1/3 according to Hawkins) , and I don't recall anyone outright refuting the notion. I was wondering if there's been any change of opinion regarding the matter or new evidence?
-Michael