Dr. King advocated non-violent, economic, protest on 3.4.1968 https://news.ycombinator.com/item?id=23414101 On 4.4.1968 they showed him the violence inherent in the system.
Do you have any good anti-authority songs in your country? I've been trying to think of what might be good ones in the US tradition.
In the shadow of the steeple I saw my people,
By the relief office I seen my people;
As they stood there hungry, I stood there asking
Is this land made for you and me?
It goes something like this (in a somewhat word for word translation, and keeping in mind that the big bad at the time were leaders of the former communist party):
Better a vagrant,
Than a traitor,
Better a hooligan,
Than a dictator,
Better a hoodlum,
Than a party activist,
Better dead,
Then a communist
(coincidentally, YT just suggested https://www.youtube.com/watch?v=nJTOD5jjac4 )
I may be wrong and it may have been after the fact though, I'm not entirely sure.
The lyrical voice is meant to represent the voice of the protesters, for what that's worth - it's not singing about 'them', but about 'us'.
That related video is pretty sad to see - one of the greatest freedom fighter and labor rights[0] protest songs, perverted as a commercial for some Netflix TV series...
[0] in case you haven't heard it before, there's an even older version then the anti fascist one, which was a protest song from the women working the rice paddies in 19th century Italy: https://m.youtube.com/watch?v=6CW6l-A1rnk
The wobblies anticipated Portal's "The Cake is a Lie" with "Pie in the Sky":
Work and pray, live on hay
You'll get pie in the sky when you die, that's a lie
(it's also bleakly amusing to have learned from Youtube that Paul Robeson —up until they cancelled his passport— sang different words to "Old Man River" in the US and in the USSR)
On a lighter note, it seems US kids do still sing "This Land" https://www.youtube.com/watch?v=rRnHx3yVuf4