Adherence to the truth is more important than adherence to a narrative. Promoting a good cause by allowing falsehoods to spread may seem helpful in the short term, but in doing so you're building a house on a foundation of sand. When you promote trivial falsehoods instead of calling them out, you allow your opposition to be the one who calls out those falsehoods, and thus undermine your cause.
When somebody on your side says something well-meaning but wrong, you should be the one to call them out. In doing so, you deny your enemy the opportunity to do so.
When somebody on your side says something well-meaning but wrong, you should be the one to call them out. In doing so, you deny your enemy the opportunity to do so.