So the arab muslims committed cultural genocide in their colonial conquests.
Got it.
It’s more nuanced than that.
historical records show that for the first 100 years or so, the Arabs did NOT want to spread their language or culture or beliefs on others - seeing it as a way to keep themselves distinct from the people they ruled.
This is similar to the way the Manchu thought they could keep themselves separate from the Han Chinese.
Or the Arian Visogoths thought they could keep themselves aloof from the Latin speaking, Catholic Ibero-Romans they ruled.
In the latter two cases (like in the case of the Turkic speaking Bulgars or the Germanic speaking Rus), the rulers got subsumed into the masses in terms of language, culture and religion.
But in the case of the Arabs, that didn’t happen - similar to the case with the Magyars/hungarians.
The Arabs in the period from the 300s to 600s were foederati (associate states) of the Romans and the Persians. In the 100 years war between Rome and Persia (500s to 600s), the Arab Ghassanids and Lakhmid tribes fought on the Roman and Persian sides respectively, but the Romans and Persians impoverished themselves and couldn’t pay the Arabs.
So the Arabs basically thought “heck, why not just take over”.
At this point the Arabs were Judeo-Christians i.e. Ebionites. Thy were content to rule over the remains of the empires and charge much lower taxes.
The arabs did NOT want to Arabize the people or make them followers of their Christian heresy as then the converts would not pay taxes.
But, after 100 years, the Ummayyad dynasty was replaced by the Abbassid - a Arabo-Persian dynasty that took on more Zoroastrian aspects and made the “Muhammad” TITLE for Jesus into a person, like the way Robin hood was created.
Only THEN - in the 750s do we have Islam being created, Arabization happening etc. as the myth becomes a “chosen people “ myth.
From the 700s onwards Arabic becomes a prestige language - and it remained that way until the TurkiC forces came along in the 11th century and they promoted Farsi as the prestige language.
As to cultural genocide - I don’t think the Arab empires did that purposely. People shifted to Arabic culture, language etc. organically, just like how a millennium earlier, people shifted to Aramaic.