“Those who make peaceful revolution impossible will make violent revolution inevitable.”
- -John F Kennedy at the White House 1962 March 13
https://en.m.wikiquote.org/wiki/John_F._Kennedy

Also from him :
a nation that is afraid to let its people judge the truth and falsehood in an open market is a nation that is afraid of its people

The great enemy of the truth is very often not the lie — deliberate, contrived and dishonest — but the myth — persistent, persuasive, and unrealistic. Too often we hold fast to the cliches of our forebears. We subject all facts to a prefabricated set of interpretations. We enjoy the comfort of opinion without the discomfort of thought.

Mankind must put an end to war or war will put an end to mankind

We know why the state monopolizes violence. We know why this CEO assassination had literally all sides of the political spectrum torqued. We know what we have to do.