The best way to defeat any possibility of social change is to pit different groups of population against each other. Working class whites in America were sold the idea that their impoverishment is caused by the “lazy” blacks or “job-stealing” Mexicans. As a result, they joyfully forgot about any questions they might have had for those better off than they are and ganged up against those who are as deprived and oppressed.
The same sad evolution has occurred with the Black Lives Matter movement. What started as a crucially important conversation about racism, devolved into a meaningless and hopeless “police officers are evil” narrative. The message of “Darren Wilson is a racist murderer” was swapped for “Darren Wilson is a policeman”, which is the most self-defeating narrative any movement can come up with.
And we are also seeing this logic eagerly adopted by professional middle classes. The erosion of the middle class is blamed on educated immigrants, and this destroys any possibility of solidarity and does nothing but distract everybody from doing anything but hating, blaming, and fantasizing about deportations.