Just compare Kurdish phonology: https://en.wikipedia.org/wiki/Kurdish_phonology to Proto-Greek phonology: https://en.wikipedia.org/wiki/Proto-Greek_language#Phonology
Why there should be aspirated voiceless stops (pʰ, tʰ, kʰ, ...) and labiovelars (kʷ, gʷ, ...) in Kurdish phonology, whereas we...