Perché il nord -ovest è più turco

I’m just speculating but I reckon there’s a few reasons.

– That region had less Muslims of other ethnic groups to mix with- it was an area with a high Christian population and the only Muslims were Azerbaijanis. Religion historically had an impact on who you could marry and likely played a part in maintaining endogamy in the region. Meanwhile the other regions where Azerbaijanis live have a diverse array of non-Turkic Muslims they could theoretically intermarry with- Talysh, Persians to the South and Lezgins to the North, which seems to be supported by the DNA tests of Azerbaijanis from those regions.

– Gazax and Tovuz have a lot of plateaus and meadows- Turkic nomads preferred steppes and pastures, not mountains. You’ll notice that [Turkic ancestry in Eurasia](https://static.tvtropes.org/pmwiki/pub/images/turkic_languages_3.png) generally correlates directly with [elevation](https://sedac.ciesin.columbia.edu/downloads/maps/nagdc/nagdc-population-landscape-climate-estimates-v2/asia-elevation-zone.jpg)- it drops drastically in the mountains of Tajikistan and Afghanistan as well as the North Caucasus because the Turks and Mongols conquered and preferred steppe.

Slightly longer, larger, and earlier Turkic migration + lots of christian neighbors.