

As far as I know, no one was forced to change their religion (Uyghurs aren’t even the biggest Muslim group in China, that’s the Hui) and there was no mass murder. I believe some innocent people who were wrongly suspected of being terrorists were strip-searched, particularly in the immediate aftermath of the attacks.
As far as we know we have not found the colonialism gene, and there is no evidence that Europeans are somehow genetically different at this locus. So we can, at least for now, ignore the possibility that Europeans are inherently evil, or predisposed towards colonialism. Rather, the actions of any people must be understood as a consequence of their circumstances and culture.
White people are not only the beneficiaries of the colonialism that has already happened, they are often also the beneficiaries of colonialism that is currently happening. The CIA didn’t coup random Central American countries because they were bored. The IMF and World Bank don’t give loans to African countries for humanitarian reasons.
I feel that the same principles that govern other animals should apply, more or less, to humans too. Although it might be more appropriate to compare human societies to populations of social animals (such as ant colonies or beehives) than to different species.
I think the difference is that historically China had excellent agricultural land, a relatively modern and stable economy, and was surrounded by poorer and less advanced countries. So people had all the resources they wanted, and had little incentive to go far away. In contrast, Europe was fragmented, with Scotland, the Netherlands and Portugal actually having poor / too little land, and so there was a push for both raw materials and markets.