It is also orignally, pedagogically linked to agitation, such that agitation perks attention for political education. Political education is a resolution of the contradictions that agitation raises. I agree with Andy on neutrality.
Neutrality guarantees the failure to achieve any level of strong objectivity.
Whether such interests consideration in the production of strongly objective knowledge counts as propaganda depends, of course, on how we define propaganda. I am critical of the second definition since it tends to commit the self-sealing fallacy by being so inclusive as to evacuate any specific meaningful content.