What is the level of assimilation/integration youre ok with?
NYC the most suface level ppl are free to mix about but choose to self segregate into their communities but are in distance to one another. Their children attend the same public schools so bengali muslim, tamil hindus, black anglicans, catholic mexicans and chinese confucianists are raised around one another to an extent.
Singapore Ethnic quotas, each floor of each building must have a quota for one of the 4 ethnicities of Singapore to promote racial harmony.
American residential schools. A policy of separating children from their parents so they only know English and assimilate into the US job market. (Kill the Indian save the child). (Kill the belief save the believer) adjusted with modern surveillance technology for safety and surviability of those involved. Maybe they can livestream their experience to help off set tuition cost.
Xingjiang Vocational schools a PRC policy of rounding up suspected terrorists so they can be reintegrated into society. And your doctrine must be approved by secular authorities. Same as 3.
Mix and match which countries should implement which plans. Please lmk if I left any plans out.