Truth as a Primary Motive

Any movement whose primary motive is not the truth will vary from the truth. Many causes will take a sliver of truth as their rallying point but then diverge from the truth in their message. Take Black Lives Matter, for example. It's an organization that rallies around a fundamental truth: the lives of black people really do matter. Then it makes further, less-true claims such as: white people are racist by simply being silent about racism, black people are racists if they don't agree with Black Lives Matter, America is a fundamentally racist country, etc. Black Lives Matter isn't devoted to speaking the truth and only the truth, and because truth isn't their primary objective, many half-truths are morally permissible in their organization. The same is true for other organizations.

I wonder, in what ways am I like Black Lives Matter? Which half-truths are morally permissible in my view of the world, and how can I devote myself more fully to the truth? What are the consequences of the lies that I allow myself to believe, and how would my life be different if I instead sought out the truth?