A colonization of the new world by andalus will be similar to the colonization made by Portugal. The Iberian view of blacks comes in part from the Arabs, with blacks being seen as the sinners (and black skin representing this).
1) colonization itself was first and foremost a process of wealth extraction before conquest and land integration
And their would need to be desperation for cruelty
Portugese with their much smaller forced were capable of sailing further while placing trading forts across the west coast of Africa
The kongo region, south east africa in Angola
South east africa in zanzibar
And much of the east coast where the kilwa sultanate was
(While also colonizing the coast of brazil and some regions in India which were put to brutal inquisition )
Now this is down to many reasons one being lack of knowledge and or understanding of the ways to operate trade in the region
The first european ships in the Indians ocean were like starved animals with constant raids and pillaging almost equivalent to sea mongols or viking crusaders
Being outsiders to this region of trade and witnessing a single pouch of spice which could set them up for life being traded like soil would turn many to bandits
Andalusians being muslims would of course follow a slightly more strict from of warfare practice in sharia so even if the barbarity would be present it would not reach the degree that it did with the portugese secondly
Yes the andalusians would still have to deal with the same trade shenanigans not due to ottoman conquest of constantinople
But Venetian hegemony of eastern trade and heavy taxes which hit the iberian economy hard especially with the bullion famine in the mid 15th century with massive price fluctuations of mineral resources due to imbalance of trade from east to west
Moving to the new world
I can definitely see alot of similarities
Both christianity and islam and take heresy very very seriously
Inquisition was used against sorcerers and fornication before wedlock or outside wedlock
Idolatry is howeve us a defining factor as it was at times accepted by the disgruntled clergy and other time looked down on as excessive spending by Italian renaissance
However idolatry is taken to the highest of punishments In muslims lands as it depicts paganism of the highest order and their are even systematic laws enabled to disallow any forms of depiction of divinity
Even drawing life is frowned upon to an extent
Islamic Ghazi travellers and merchants that come across the human sacrifices of the Aztec empire would certain take a quick prayer to god before sending word back of the abominable levels of sacrilege being practiced in these lands
We could see some form of Fatwah being given however I'm not to knowledgable on the scholars of that time so I couldn't give a proper answer on the exact behaviour of andalusian
However what comes after the bloodshed is definitely important
The dhimmi in islam are protected
And that is the one thing that divides it from christendom
Christianity did not face clear set rules an regulations for warfare and how to treat minorities
However both religions heavily took part in slavery with muslims doing it for longer or course with different customs and traditional views of slavery it was still practiced by both
If we want to see how an Islamic conquest and eventual rule over the aztec, incan and Mayan populations would work out
We could look elsewhere for examples such as the conquest of india
How islam slowly made it's way deep into Indian lands
MERCENARY slave soldiers with political power
Powerful single state that later fractures and spreads efficient military generals into the wider region
Better military equipment
Prosletyzing to merchants and upperclasmen royalty with marriage proposals
And finally exemption from harassment of non religious population/capability to have whatever relgions they so choose as they follow the law
Finally the race theory in Islam is very uncomplicated
Your religion trumps your race
The first person to ever give the islamic call to prayer was a Habesha man known as Bilal ing Rabah and he was a loyal first generation companion of the prophet
Islam is an incredibly serious religion it should be very idiotic to believe scholars would allow the heretical thoughts of people with complexion similar to the companion of the prophet himself
Although it would be understandable if the misconception was due to the practices of said people of sin
Andalusians had held lands in mirroc and had direct access to the salt and gold mines through trade routes in westa africa
Also their some recorded evidence of muslims having know about the cape and some even having saled around africa howeve muslims held the much more lucrative and easily obtainable trade route through the egypt and the red sea
I'm guess some arab traveller probably around the time of the cordoban caliphate managed to make it to the ivory coast and seen some disturbing levels of cannibalism and human sacrifice which was practiced in this region for a while, and decide to write his thoughts on the matter which must've birthed some misconceptions
These views howeve are not held by the entire religion