Big data aggregation makes this process much much easier. We are living in unprecedented times of mass surveillance, and we have yet to have a real reckoning of what that means in the hands of extreme ideologies.

Also things don't have to be as extreme as literally killing all members of a minority group for this to be deemed "bad". It can be as simple as targetted influence campaigns to push certain policies/agenda. The ability to influence on mass scales has never been easier and cheaper. There are many examples throughout the world of how that influence has been used. And while yes influence campaigns have always existed in some form, the degree of targeting and the ease at which this has been made is a case where and difference in scale is a difference in kind. This is a powerful tool that I don't believe anyone should have access to. States, companies, or individuals