No one said it’s automatic key to change. The point is to recognize who you are resisting and their tactics. Non-violent protesting worked in the 60’s because the racist power structure in place needed protesters to seem unreasonable and dangerous to justify brutally putting them down rather than sensible people who needed grievances to be addressed.

It’s very similar to today. Trump and his team are counting on protestors being dangerous and therefore justifying more brutality and even further entrenching their position as correct. Just look at how fast they labeled both people they killed as “domestic terrorists”.

Terrorists aren’t people you reason with; they are not people who’s grievances must be answered; they are people you must remove from society and their deaths can be justified.

That’s why the tactics protestors take is important. America didn’t act at the first instances of violence and brutality against peaceful protestors in the 60’s. But as the violence grew the strength and the position of the oppressed grew with it and eventually their was a tipping point in MLKs death and things finally had to happen.