I think one of the reasons this simplification is happening, is that nuance generally has failed to gain traction in the past. A large part of why the far right / racist movement has grown a lot the past 20 years or so is that their narrative is so simple: "Immigrants have higher crime rates and we're taking in more immigrants, which is bad." Fighting this with nuance and trying to say that statistics is more complicated than that hasn't worked. I would say that the public education system needs a complete overhaul to fix this (critical thinking, media literacy and such), but even if that were to happen, it would take 20-30 years.

Also, in the end, I don't think these type of views causes that much harm. Okay, so a group of people end up being "fake" anti-racists, but it's still raising awareness and it might cause people to make slightly different choices in their day-to-day lives. This isn't comparable to Kony 2012 where people changed their profile picture on Facebook for literally no effect.