::::Whatever  Bojtár may be highly distinguished in his field, but it does not seem that his field is Indo-European linguistics, and nothing that you've said above changes that.  This might not be very important in other contexts, but in the case of the Anatolian / Cavalli-Sforza & Renfrew hypothesis vs. the Kurgan / Pontic-Caspian steppe hypothesis, it reinforces a longstanding pattern that very few actual working Indo-Eutopeanists have supported the Anatolian hypothesis.  The Kurgan / Pontic-Caspian hypothesis won't be too effectively discredited unless more than one prominent, respected, and well-known Indo-Europeanist comes out publicly against it. 
 ::::And my comments about Janos Makkay were highly-relevant to showing how some of his assertions are flawed, since he complains about the Kurgan hypothesis requiring linguistic stasis, but the Kurgan hypothesis does not require linguistic stasis (only a period of sprachbund or dialect continuum), while the Anatolian hypothesis does require effective stasis...