I'm disappointed in how many comments here are just kneejerk reactions. Reaching for weird comparisons, getting angry at the idea of diversity and social justice, and many others. This wasn't enforced from outside. It's the organisers who agreed: yup, that's not what we want to do ( https://twitter.com/nmsanchez/status/870811022306574336 ) Stop for a moment, think of how you'd organise a conference. Is it different?…
A couple other comments said that they did a blind review of the submitted papers. I can't think of a farer review process.