How? By providing free food, accommodation, education to their kids and exempting them from decades old one child policy?
If there are mistreated people in China, they are majority Han Chinese. for ethnic minorities in China it's written in the law that they enjoy wide range of preferential treatment, they and their children get subsidies and even for entrance exams of school of all levels for decades they get extra scores to help them to go to better schools than Han Chinese students. And you won't believe it ,those unfair treatments are written in the law!!
China throughout the history was never a very religious country, religions are never a big issue in Chinese social and political life, that's why all religions can coexist peacefully in China and the country never experienced things like crusades or jihads or things like that. As long as the religions don't challenge the government's power or the country's territorial integrity China always leaves them alone, that's always the case now and in the history. Saying China targets and persecutes certain religions is just absurd, it only shows how little they know China now and Chinese history.
No need to argue with them.. no matter how many times we debunked the accusations, they won't believe you..
let them believe what they want to believe and gave them middle fingers