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
Advertising in Inc vs Wall St Journal vs People magazine vs Wired vs TV Guide vs Car & Driver vs Cosmo vs Ebony all gave you easy ways to target different audiences. It's more targeted now, but I don't think it's multiple orders of magnitude more powerful (mostly because the reach isn't nearly the entire story; you still have to influence after reaching.)