I respectfully disagree.
The notion that oppressed peoples need to behave themselves in order to reach their goals is absurd. The reality is that what you suggest has already been tried for many, many decades. I alone have tried, literally for decades, to explain to white people (and to some extent, 'white actors', brown people who want to be white) what racism means for people of color in general and for Black people specifically. I've tried tactful phrasing, calm voicing, and every manner of polite delivery of factual and subjective information. I've done this myself for almost 40 years.
Yet, white people still act racist. By this, I mean they still refuse to acknowledge their privilege. White people, by and large, aren't listening.
For how long should the oppressed group show this sort of extreme magnanimity before we admit to ourselves that it isn't working? That white people aren''t listening?
HOw many more chances will white people get before we're allowed to try another tack?
You should consider that before recommending a more measured approach: we've already taken that approach, and it isn't working.