theprestige
Penultimate Amazing
The only people who are pro-colonialists are those who will be in power, wealthy or able to push their agenda (such as converting others to their chosen religion). No pro-colonialist will be happy being the one ruled over.
If those who desire the power that comes with colonialism, find a place being the alien overlord's local rulers, or the wealthy gets to keep their wealth and the religious their religion, they may tolerate and cooperate with the alien rule. That is what happened in places such as India, where the local rulers were kept on board with a share of the power etc.
Easy to say that about pro-colonialists you have never met, and about whose actual arguments and positions you are ignorant.
Because it's not as if millions upon millions died due to British rule or anything. Or as if the trade policies imposed by the British severely harmed India's native development. And native industry certainly wasn't destroyed.