Structural similarities like VSO word order may be typological coincidences rather than proof of direct contact.
Vennemann argues that after the last Ice Age, much of Western and Central Europe was inhabited by speakers of Vasconic languages , of which Basque is the only surviving member. Europa Vasconica-Europa Semitica
This "substrate" influenced the vocabulary and structure of the languages that eventually replaced them. Structural similarities like VSO word order may be
He points to Old European hydronyms (river names) across the continent, which he reinterprets as having Basque-related origins rather than Indo-European ones. Europa Vasconica-Europa Semitica
The comparative method , the gold standard for determining language relationships, does not strongly support these deep-time connections.