I still don’t see much of dehumanizing. What you have is a fight over political power in the age where the idea that “All men are created equal” wasn’t either widespread or popular (outside of the religious context).
Basically, you need to show that the metropoles treat the colonists much worse than comparable groups in the metropolis itself. For example, if you have an uprising in the colony, it was suppressed much more harshly than, say, a similar uprising in the metropolis.
Your example of Spanish colonies seems to speak to racism much more than to the metropolis dehumanizing its own colonists.
I still don’t see much of dehumanizing. What you have is a fight over political power in the age where the idea that “All men are created equal” wasn’t either widespread or popular (outside of the religious context).
Basically, you need to show that the metropoles treat the colonists much worse than comparable groups in the metropolis itself. For example, if you have an uprising in the colony, it was suppressed much more harshly than, say, a similar uprising in the metropolis.
Your example of Spanish colonies seems to speak to racism much more than to the metropolis dehumanizing its own colonists.