A lot of people that claim that MLK jr was somehow loved by all and better than today's civil rights leaders, are just lying.
A lot of people claiming that "Black Lives Matter" or "Defund the Police" are bad marketing, and that they would support these movements if they were named something better like "Non-violent march," are just lying. It's not the phrase that these people object to. It's the underlying principle. They do not accept that current US policing is a negative on reducing crime.
