As the original post states, peaceful protests were originally a warning - they were the last opportunity for nonviolent communication before the violence started. Their function relies on that being the next step - one that the organization wants to avoid.
So what are we supposed to do? Take up arms and start shooting?
There is no alternative to peaceful protest.
As a really great character once said: Get angry. Angry gets shit done.
Peaceful protests are pointless.
As the original post states, peaceful protests were originally a warning - they were the last opportunity for nonviolent communication before the violence started. Their function relies on that being the next step - one that the organization wants to avoid.