Amedeo's parting shot

I have received this farewell message from Amedeo:

"Dear Moderator, I would not want this Group to go to the dogs. So I take my leave with these closing words: The whole linguistic, non-philological, approach to languages has been a big mistake. There is not a single (ONE) word in the world which you can claim to be Proto-Indo-European. Please go back to the drawing board and start the research [language HISTORIE] all over again. Sincerely, Amedeo"